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Homepage /index.html Main database search engine, filters, categories and statistics. PC Build Guide /guides/pc-build-guide/ Detailed step-by-step diagnostic guide for building and checking your custom PC. CPU Overheating Guide /guides/cpu-overheating/ Learn how to identify, monitor and resolve processor thermal throttling and high temperatures. DirectX Errors Manual /guides/directx-errors/ Fix common gaming issues like DXGI_ERROR_DEVICE_REMOVED or D3D compile errors. BSOD Codes Reference /guides/bsod-codes/ Resolving Windows Blue Screen of Death stop codes and driver conflicts. GPU Crash Troubleshooting /guides/gpu-crash-gaming/ Resolve graphics card black screens, TDR crashes, and DDU driver reinstalls. BIOS/UEFI Startup Errors /guides/bios-startup-errors/ Fix POST failure codes, secure boot violation, and CMOS battery leakage. PC Diagnostics Tools /guides/pc-diagnostics-tools/ Our recommended software suite for monitoring and benchmarking computer hardware. Windows Error Codes /guides/windows-error-codes/ A deep dive into system processes, Event Viewer logs, and Windows Update failures. RAM Troubleshooting /guides/ram-troubleshooting/ Fix memory crashes, test for hardware failure with MemTest86, and configure motherboard XMP/EXPO overclocking profiles. SSD & HDD Diagnostics /guides/ssd-hdd-diagnostics/ Check storage drive health using S.M.A.R.T., run filesystem repairs with chkdsk, and resolve boot device errors. Windows Update Fix /guides/windows-update-fix/ Troubleshoot Windows Update loops, reset the local update services database, and resolve WinRE partition sizing issues. PSU Troubleshooting /guides/psu-troubleshooting/ Diagnose hardware shutdowns under gaming/3D load, run the PSU paperclip test, and check motherboard voltage rails.

POST failure /error/POST-FAILURE/ Power-On Self Test failed. The PC will not pass the check and will not boot. CMOS Checksum error /error/CMOS-CHECKSUM-ERROR/ BIOS detected invalid data in CMOS. Settings have been lost. Violation of Secure Boot /error/SECURE-BOOT-VIOLATION/ Secure Boot blocked unsigned boot code from running. BIOS update failure /error/BIOS-UPDATE-FAIL/ Firmware update failed. The board does not need to boot. TPM chip not found /error/TPM-NOT-FOUND/ Windows 11 or BitLocker does not find the TPM 2.0 module. Wrong order of boot device in BIOS /error/BIOS-UEFI-BOOT-ORDER/ The computer is booting from the wrong device (USB instead of SSD or vice versa) due to the wrong sequence in the BIOS. Intel Management Engine (ME) corruption /error/ME-FIRMWARE-CORRUPTION/ The Intel ME firmware is corrupted, which leads to strange problems (PC won't turn off by itself, fans running at full speed, lack of sensors). Insufficient space in Option ROM BIOS /error/ROM-SPACE-EXHAUSTED/ The board has too many associated devices with custom ROMs (eg RAID controllers, multiple GPUs) and has run out of space to initialize them (POST). BIOS ROM checksum error /error/BIOS-ROM-ERR/ The BIOS ROM memory is corrupted or unreadable. WHEA uncorrectable error /error/WHEA-UNCORRECTABLE-ERROR/ Critical CPU or chipset hardware error (BSOD 0x124). Caused by voltage instability, overheating or overclocking. Clock watcher timeout /error/CLOCK-WATCHDOG-TIMEOUT/ The CPU core stopped responding to an interrupt request. Caused by overclocking or faulty driver. Temperature limitation of performance /error/CPU-THERMAL-THROTTLE/ The CPU reached the maximum safe temperature and activated throttling. Performance is reduced. MCE - Machine Check Exception /error/MACHINE-CHECK-EXCEPTION/ The CPU has detected a fatal hardware error. It could be a faulty processor or motherboard. Low CPU supply voltage /error/CPU-VCORE-LOW/ Powering the processor below the minimum causes instability and crashes. CPPC not supported /error/CPPC-NOT-SUPPORTED/ Collaborative Processor Performance Control is not active. Reduces the effectiveness of CPU boost. Limiting CPU performance with a performance limit of /error/POWER-LIMIT-THROTTLE/ The CPU is running below maximum power due to the PL1/PL2 limits of the motherboard or laptop. CPU Memory L1 Cache Error /error/L1-CACHE-ERROR/ The processor's internal L1 cache reported an unrecoverable data error. Extreme system instability. Activation of PROCHOT signal /error/PROCHOT-SIGNAL/ The Processor Hot (PROCHOT) signal has been activated, which causes extreme throttling, sometimes even at low temperatures. Thermal throttling of CPU performance /error/PROCHOT-1/ The processor slows down to avoid overheating and damage. Critical voltage drop across the core (Vdroop) /error/VCORE-DROP/ The power supply cascade does not supply sufficient voltage to the load. Exception while reading from L2/L3 cache /error/L2-CACHE-EXC/ The processor encountered corrupted data in its own cache. Processor microcode error /error/UCODE-0x1A/ The processor's internal instruction set encountered an unknown exception. Loss of Thread Synchronization (SMT) /error/SMT-SYNC-FAIL/ The logical cores have lost synchronization with each other. Integrated Memory Controller (IMC) failure /error/IMC-FAULT-00/ The controller inside the processor cannot communicate stably with the RAM. Crash when executing AVX instructions /error/AVX-PANIC/ Calculation error when using AVX/AVX2 wide vector instructions. Stuck on hibernation /error/C-STATE-HUNG/ The processor failed to properly wake up from sleep. Power cascade overheating (VRM) /error/VRM-TEMP-CRIT/ VRM sensors on the motherboard report critical temperatures limiting the CPU. Bad contact in processor socket /error/SOCKET-PIN-FLT/ The pins in the processor socket do not touch, which causes accidental disconnection of the lines. Exceeding the maximum thermal limit (TDP) /error/TDP-LIMIT-MAX/ The processor draws more power than the BIOS allows. Base clock instability (BCLK) /error/BCLK-JITTER/ The basic frequency generator on the board fluctuates. Branch prediction error /error/BRANCH-PRED-ER/ The jump prediction logic inside the CPU failed, typical of aging silicon. Coprocessor math error (FPU) /error/FPU-MATH-ERR/ The floating point unit returns imprecise results. Loss of internal bus synchronization /error/RING-BUS-FAIL/ The bus connecting the cores inside the processor collapsed. P-State transition failure /error/CPU-PSTATE-ERR/ Processor failed to transition to a requested performance state. AMD Infinity Fabric Instability (FCLK) /error/AMD-FCLK-INFINITY-ERR/ AMD systems crash or become unstable due to out of sync FCLK (Infinity Fabric clock) and MEMCLK. IRQL driver - incorrect level /error/DRIVER-IRQL-NOT-LESS-OR-EQUAL/ The driver accessed memory at the wrong IRQL level. The most common type of BSOD. USB device - Code 43 /error/CODE-43-USB/ Windows has stopped the USB device due to a reported problem. Controller power status error /error/DRIVER-POWER-STATE-FAILURE/ The driver returned an invalid power state when the system went to sleep or wake up. Driver Verifier found a violation of /error/DRIVER-VERIFIER-FAIL/ Windows Driver Verifier detected illegal driver behavior in memory or IRQL. SYSTEM_THREAD_EXCEPTION_NOT_HANDLED /error/SYSTEM-THREAD-EXCEPTION/ A system thread threw an unhandled exception, most commonly a bad driver (.sys) file. Code 10 - This device cannot start /error/CODE-10-DEVICE-CANNOT-START/ Windows Device Manager reported that the device could not start due to a failure to load or a faulty driver. ndis.sys critical driver error (BSOD) /error/BSOD-ndis.sys/ Windows has terminated due to a fatal error in the kernel module ndis.sys. Critical tcpip.sys driver error (BSOD) /error/BSOD-tcpip.sys/ Windows has terminated due to a fatal error in the tcpip.sys kernel module. usbport.sys critical driver error (BSOD) /error/BSOD-usbport.sys/ Windows has terminated due to a fatal error in the usbport.sys kernel module. fltmgr.sys critical driver error (BSOD) /error/BSOD-fltmgr.sys/ Windows has terminated due to a fatal error in the fltmgr.sys kernel module. ntfs.sys critical driver error (BSOD) /error/BSOD-ntfs.sys/ Windows has terminated due to a fatal error in the ntfs.sys kernel module. Classpnp.sys Driver Critical Error (BSOD) /error/BSOD-classpnp.sys/ Windows has terminated due to a fatal error in the classpnp.sys kernel module. dxgkrnl.sys critical driver error (BSOD) /error/BSOD-dxgkrnl.sys/ Windows has terminated due to a fatal error in the dxgkrnl.sys kernel module. igdkmd64.sys Driver Critical Error (BSOD) /error/BSOD-igdkmd64.sys/ Windows has terminated due to a fatal error in the igdkmd64.sys kernel module. amdkmdag.sys critical driver error (BSOD) /error/BSOD-amdkmdag.sys/ Windows has terminated due to a fatal error in the kernel module amdkmdag.sys. nvlddmkm.sys critical driver error (BSOD) /error/BSOD-nvlddmkm.sys/ Windows has terminated due to a fatal error in the nvlddmkm.sys kernel module. Error code 43 on USB controller (xHCI) /error/CODE-43-USB-HUB/ The entire USB controller reports code 43, which disconnects all USB ports on the given group. NVIDIA Container process consumes CPU /error/NVIDIA-CONTAINER-HIGH-CPU/ The nvcontainer.exe or NvTelemetryContainer.exe processes constantly consume 5-20% CPU even when idle. No audio output device is installed /error/AUDIO-NO-OUTPUT/ Windows says it doesn't see speakers or headphones. DDU clean uninstall failure /error/DDU-FAIL/ The Display Driver Uninstaller (DDU) failed to completely remove the old GPU drivers, preventing a new installation. VIDEO TDR failure (0x116) /error/VIDEO-TDR-FAILURE/ GPU stopped responding, Windows reset it. Crash caused by driver or hardware failure. The screen goes black and the system restarts the driver. nvlddmkm.sys / TDR Crash /error/nvlddmkm.sys/ NVIDIA kernel driver crash. The screen goes black, the system tries to restart the driver. One of the most common NVIDIA BSOD codes. Code 43 - GPU Stopped Windows /error/CODE-43-GPU/ Windows stopped the GPU in Device Manager. The driver reported an unrecoverable error to the kernel. The most common GPU error after driver issues. DXGI - GPU stopped responding /error/DXGI-ERROR-DEVICE-HUNG/ DirectX has detected that the GPU has stopped processing commands. Game or app crashes. GPU fan failure /error/GPU-FAN-FAILURE/ The GPU fan stopped spinning. Causes rapid overheating and emergency shutdown. atikmpag.sys – AMD GPU crash /error/atikmpag.sys/ AMD GPU kernel driver crash. NVIDIA nvlddmkm.sys equivalent for AMD Radeon cards. Black screen with no signal /error/GPU-BLACK-SCREEN/ The monitor shows a black screen with no signal, although the PC appears to be running. VRAM corruption /error/VRAM-CORRUPTION/ The GPU video memory contains bad data. It causes artifacts, app crashes or BSODs. Graphical artifacts on screen /error/GPU-ARTIFACTING/ Random colored dots, stripes or triangles appear on the screen. Caused by VRAM error or overheating. PCIe slot bandwidth limitation /error/PCI-E-BANDWIDTH-ISSUE/ The graphics card runs on a lower generation or PCIe bus width (eg Gen3 x4 instead of Gen4 x16), which reduces performance. Video Memory Artifacts (Checkerboard) /error/VRAM-ART-01/ Colored squares or bars appear on the screen caused by a VRAM error. PCIe bus timer timeout /error/PCIE-TDR-116/ The graphics card did not respond to the motherboard within the timeout. Unstable graphics core clock /error/CORE-CLK-CRASH/ The core of the graphics card crashes when switching to 3D load. GPU power limit hit hard /error/PWR-LIM-THROT/ The card suddenly underclocks because it has hit the maximum consumption. Graphics fan controller failure /error/FAN-CRV-FAIL/ Graphics card fans do not spin or run at 100% regardless of temperature. Loss of video signal synchronization /error/DISP-SYNC-LOSS/ The image goes black for a second and pops up again, the connection with the monitor is lost. The graphics card has been physically disconnected from Windows /error/DEV-REMOVED/ The game will report that the graphics card has been disconnected from the system while running. Image flickering (G-Sync/FreeSync) /error/GSYNC-FLICKER/ The adaptive sync module causes the brightness to flicker violently. Shader compilation error /error/SHD-COMP-ERR/ The graphics card was unable to process the game's shader code. Desynchronization of linking multiple graphics /error/SLI-DESYNC/ Two graphics cards render images out of order (Micro-stuttering). GPU Hotspot Critical Temperature /error/HOTSPOT-110C/ The hottest sensor inside the core exceeded 110°C. View controller timeout and refresh /error/NVLDDMKM-TMOUT/ The graphics driver stopped responding for a second and Windows restarted. Extreme coil resonance on card /error/COIL-WHINE-MAX/ Coils make a deafening squeal due to high FPS or load. Corrupted graphics card firmware (VBIOS) /error/VBIOS-CORRUPT/ Graphics card won't boot due to damaged chip BIOS. Fan passive operation error /error/ZERO-RPM-FAIL/ The card does not turn off the fans even at zero load and low temperature. GPU fan controller failed /error/GPU-FAN-STOP/ The graphics card fan controller has failed, fans are not spinning. Monitor reports No Signal via HDMI /error/HDMI-NO-SIGNAL/ The screen is black and shows 'No Signal' even though the PC is on and the cable is connected. DisplayPort - signal loss or image flickering /error/DISPLAYPORT-NO-SYNC/ Monitor connected via DisplayPort randomly flickers, dims, or loses sync. Resizable BAR (SAM) causes performance degradation /error/RESIZABLE-BAR-ERROR/ FPS drops in some games after enabling Resizable BAR (AMD Smart Access Memory) or nVidia NVLink. Thermal throttling of the VRM on the motherboard /error/VRM-OVERTEMP-THROT/ Processors with a high TDP (i9, Ryzen 9) reduce performance due to overheating of the power supply circuits (VRM) of the board. USB device handle request failed /error/USB-DEV-DESC-FAIL/ When connecting a USB device, the system failed to read its identifier and reports error code 43. Bluetooth adapter error 43 /error/BT-ERR-43/ Bluetooth has stopped working, the icon has disappeared and the device is reporting Code 43. Laptop battery is connected but not charging /error/BATT-NOT-CHARGING/ The adapter is on the network, the icon shows power, but the percentages do not increase. Overvoltage on USB hub port /error/USB-POWER-SURGE/ The USB device has exceeded the power limits of its hub port. Prompt to clear TPM after turning on the computer (fTPM/PTT) /error/TPM-CLR-PROMPT/ After turning on the PC (often when changing the CPU), a message will appear asking you to press Y or N regarding fTPM NV recovery. PCIe communication error /error/PCIE-ERROR/ Error on the PCIe line between the motherboard and the component. Motherboard VRM overheating /error/VRM-OVERHEAT/ The Voltage Regulator Module is overheating. Limits CPU performance or causes shutdown. PCIe bifurcation error /error/PCIE-BIFURCATION-ERROR/ The motherboard incorrectly distributes the PCIe lines for the adapter (NVME RAID, PLX switch). Corrupt CMOS checksum /error/CMOS-CHK-ERR/ The BIOS has lost its settings due to a dead coin-cell battery on the board. POST Critical Error (Code 55 - Memory) /error/POST-CODE-55/ The board failed to initialize RAM during boot. Failure to split PCIe lines (Bifurcation) /error/BIFURC-FAIL/ The splitter adapter (eg for multiple M.2 drives) did not get the correct PCIe lines. Missing certificates for Secure Boot /error/SEC-BOT-KEY-MS/ Safe boot platform keys deleted, can't boot into Windows 11. Security TPM chip verification failure /error/TPM-ATT-FAIL/ The Trusted Platform Module failed to verify the identity of the hardware. Unbalanced load of the board power phases /error/VRM-PHS-IMB/ One of the power supply phases on the board does not supply current, the others are critically overloaded. Critical failure of USB controller on board /error/USB-CTL-DEAD/ Some or all of the USB ports have completely stopped responding, the mouse and keyboard are not working. Released Passive Chipset Cooler (Chipset) /error/PCH-OVERHEAT/ The chipset on the board is overheating because the passive cooling has lost contact. Integrated sound card not found /error/AZA-AUD-MISS/ The integrated sound card (eg Realtek) completely disappeared from the device manager. Error uploading board firmware (BIOS) /error/BIOS-FLS-FAIL/ A corrupt installation file was detected while attempting to update the BIOS. Loss of connection with PCH chipset /error/DMI-LNK-DOWN/ Communication between the processor and the rest of the board collapses. Physical CMOS battery drain /error/CMOS-BAT-LEAK/ Physical damage to the board caused by button cell battery acid. Lighting Controller Short (RGB/ARGB) /error/ARGB-HDR-SHRT/ The motherboard has shorted on the 5V ARGB connector, the lighting is flashing or off. Sensor bus (LPC) freeze /error/LPC-BUS-HANG/ The sensor bus for temperature monitoring and fan control stopped responding. Burnt connector for connecting the fan /error/FAN-HDR-BURN/ Connecting a too powerful fan fried the PWM control circuit on the motherboard. USB device overcurrent status detected /error/USB-OVERCURRENT/ System shutting down after 15 seconds to protect motherboard from USB short circuit. PCIe generation - speed mismatch /error/PCIE-GEN-MISMATCH/ GPU or NVMe SSD running on PCIe 3.0 instead of PCIe 4.0/5.0, performance is significantly reduced. Connected but no internet access /error/NET-WIFI-NO-INTERNET/ Wi-Fi reports a connection to the router, but Windows says that it cannot access the outside. Limited network connection /error/WLAN-LIMITED/ There is a yellow triangle with an exclamation mark on the Wi-Fi icon. Secure connection (SSL) error /error/ERR-SSL-PROTOCOL-ERR/ The browser refuses to load the web page due to an HTTPS/SSL error. Network I/O Error /error/NETIO-ERROR/ A network driver or hardware caused an I/O communication error. DNS translation failure /error/DNS-RESOLUTION-FAIL/ PC cannot translate domain names to IP addresses. Corrupted Winsock catalog /error/WINSOCK-CORRUPT/ Winsock catalog is corrupted, network connections are not working. Website not loading. Wi-Fi driver crash /error/WIFI-DRIVER-CRASH/ The wireless network adapter has stopped responding or is disconnecting. SSL handshake failure /error/SSL-HANDSHAKE-FAIL/ The browser or application cannot establish an encrypted HTTPS connection. Default gateway not available /error/GATEWAY-UNAVAILABLE/ The computer is connected to the network (LAN/Wi-Fi) but cannot access the Internet due to loss of connection with the default gateway (router). IP address conflict on the network /error/IP-ADDRESS-CONFLICT/ Your device has been assigned the same IP address that is already being used by another device in the local network. The connection is not working. IP address assignment timeout (DHCP) /error/DHCP-TIMEOUT/ The computer connected to the network, but the router did not assign an IP address to it. Domain name resolution (DNS) failure /error/DNS-RES-FAIL/ The browser cannot translate the web address to an IP address (DNS problem). Routing loop in IPv6 /error/IPV6-LOOP/ Packets in an IPv6 network go around in a loop and never reach their destination. Constantly restarting the Wi-Fi adapter /error/WLAN-RST-LOOP/ The Wi-Fi card keeps disconnecting and restarting due to a driver error. False report of unplugged network cable /error/CBL-UNPL-FLS/ The NIC reports 'Cable disconnected' even though the cable is physically plugged in. Physical MAC address conflict in network /error/MAC-CONFLICT/ Two devices on the network share the same physical MAC address. TCP/IP protocol structure corruption /error/TCP-IP-CORR/ Windows internal networking layer is corrupt, no internet working. Missing or corrupted Winsock registries /error/WINSOCK-REG-ER/ Application communication via internet sockets has completely crashed. Encrypted VPN tunnel crash /error/VPN-TUN-DROP/ The encrypted VPN connection was unexpectedly terminated by the firewall. Connection speed limiter (QoS) error /error/QOS-THROTTLE/ Quality of Service on the router or in Windows inadvertently limits the speed to a fraction of the maximum. Packet loss due to faulty multicast filtering /error/IGMP-SNP-FAIL/ A local switch or router does not properly filter multicast traffic, IPTV is interrupted. ARP Cache Poisoning Detection (Network Attack) /error/ARP-POISON/ An attempted Man-In-The-Middle attack has been detected on your network. Proxy detection failure /error/PRX-DET-STLL/ The computer is stuck detecting proxy settings and is blocking web traffic. Packet Transmitted Size (MTU) Mismatch /error/MTU-MISMATCH/ Different Maximum Transmission Unit settings cause fragmentation and brutal network slowdown. The WLAN AutoConfig service failed /error/WLAN-AUTO-FAIL/ The wireless network configuration service has failed, the Wi-Fi icon has completely disappeared. DHCP lease renewal failure /error/NET-DHCP-LEASE/ The system failed to renew its IP address from the DHCP server. Corrupted Winsock catalog /error/WINSOCK-CORRUPT-2/ The Internet connection works on the router, but Windows cannot establish any TCP/IP connections. IPv6 tunnel causes connectivity issues /error/IPV6-LEAK-TUNNEL/ Windows automatically creates a 6to4 or Teredo tunnel for IPv6, which causes the connection to slow down or fail. DNS Cache Poisoning / Rebinding /error/DNS-REBINDING-ATTACK/ The web browser or DNS cache has been poisoned, causing redirects to bad websites. Source overvoltage /error/PSU-OVERVOLTAGE/ The power supply supplies a higher voltage than specified. Risk of component damage. Insufficient resource power /error/PSU-INSUFFICIENT/ The resource does not have time to cover the consumption of all components. Causes resets. Higher power ripple (Ripple) /error/PSU-RIPPLE-NOISE/ The source produces higher than permitted supply voltage ripple. It causes instability or damage to the capacitors on the board. Activation of overcurrent protection (OCP) /error/OCP-TRIGGERED/ The source detected a dangerously high current draw on some of the lines (typically 12V) and immediately shut down the computer just to be safe. Extreme coil whine (Coil Whine) /error/COIL-WHINE-EXTREME/ The source or graphics card emits a high-pitched, annoying buzzing sound, especially under load or at high FPS. Overvoltage protection (OVP) activated /error/OVP-TRIPPED/ The source immediately shut down because the voltage on some of the branches (12V, 5V, 3.3V) increased dangerously. Overcurrent protection (OCP) activated /error/OCP-TRIPPED/ The resource has shut down because one of the components (often the GPU) is drawing more current than the cable/branch can handle. Undervoltage protection (UVP) activated /error/UVP-TRIPPED/ The voltage fell below the critical limit, the system shut down as a precaution. Overload protection (OPP) activated /error/OPP-TRIPPED/ The total required system power exceeds the maximum power supply limit. Short circuit protection (SCP) activated /error/SCP-TRIPPED/ The source has detected a physical short circuit, immediately disconnects the power supply, the PC does not respond to the button at all. Overheat protection (OTP) activated /error/OTP-TRIPPED/ The source's internal temperature sensors exceeded the safe limit and the source shut down. Power Good (PG) signal failure /error/PG-SIGNAL-FAIL/ The power supply failed to confirm to the motherboard in time that the voltage is stable, therefore the board will not start (POST). Extreme Electrical Noise (Ripple) /error/RIPPLE-NOISE-MAX/ The DC power from the power supply contains too much AC interference (noise), causing instability and freezing of the PC. Soldering the power connector /error/PWR-CABLE-MELT/ The plastic connector (typically 12VHPWR or older PCIe) has melted due to contact resistance. Squealing coils from source /error/COIL-WHINE-PSU/ The power supply emits a very unpleasant high-frequency sound, especially when switched off or under load. Memory Management - BSOD /error/MEMORY-MANAGEMENT/ Windows has detected a critical RAM problem. Most often a faulty memory module. Bad memory pool header /error/BAD-POOL-HEADER/ Pool manager detected corrupted data in memory. It could be the RAM or the driver. XMP Profile Instability /error/XMP-INSTABILITY/ Activated XMP/EXPO profile causes instability or non-booting. RAM module not detected /error/RAM-NOT-DETECTED/ Motherboard doesn't recognize RAM - reports low memory or won't boot. ECC RAM Error /error/RAM-ECC-ERROR/ The ECC memory detected and corrected the error, but there is a risk of an uncorrectable error when retrying. Paging Fault During POST/Boot /error/PAGE-FAULT-BOOT/ BIOS/UEFI detected a fatal page fault during operating system startup. Windows won't load. SPD data chip damage /error/SPD-CORRUPTION/ The Serial Presence Detect (SPD) chip on the RAM module has corrupted data, the system does not know what timing and frequency to set. Bad memory profile (SPD) checksum /error/SPD-CHK-ERR/ The motherboard cannot read the timing from the memory module. Memory block interleaving error /error/BNK-INT-ERR/ Communication problem between the front and back of the memory module. Crash with XMP/EXPO profile enabled /error/XMP-BOOT-FAIL/ Memory cannot run at factory overclocked values. Memory hardware error in load /error/MEMTEST-ERR-8/ Memory diagnostics detected a hardware defect in the memory cell. Insufficient RAM supply voltage /error/VDDQ-U-VOLT/ The modules lack the voltage to maintain the set frequencies. Instability at Command Rate 1T /error/1T-CMD-FAIL/ The memory controller does not have time to process commands with a delay of only 1 clock. ECC error limit exceeded /error/ECC-LIM-EXC/ Server memory is fixing so many bugs that it can't keep up. Charge Leakage Detection (Row Hammer) /error/ROW-HAM-DET/ Dangerous charge spillage between memory cells noted. Asymmetry of two-channel memory connection /error/DCH-ASYNC/ Although the memories run in Dual-Channel, they are poorly matched, which limits throughput. Oxidation of the gold contacts of the memory module /error/PIN-OXIDATION/ Contact with the socket is broken due to dirt or oxidation on the pin. Memory refresh period expired /error/REF-TIMEOUT/ Memory cells have lost their charge before the next refresh cycle. Loss of controller divider sync /error/GEAR-MD-FAIL/ The motherboard cannot run stably in split controller frequency mode. RAM Secondary Timing Corruption /error/SUBTIM-CORRUPT/ The board set too aggressive sub-timings (eg tFAW, tRRD). Overheating the power chip on DDR5 /error/DDR5-PMIC-TMP/ The Power Integrated Controller (PMIC) on the DDR5 memory has overheated. Memory calibration failure on PC startup /error/IMP-CAL-FAIL/ The motherboard is stuck in a loop while calibrating the memory signal impedance. MCE memory read error (Memory Read Error) /error/MCE-MEM-READ-ERR/ The processor detected an unrecoverable error while reading data from memory and wrote it to the MCE log. S.M.A.R.T.: Remapped Sectors /error/SMART-REALLOCATED/ SSD/HDD remaps bad sectors. The disk is nearing the end of its life. NTFS_FILE_SYSTEM error /error/NTFS-FILE-SYSTEM/ NTFS file system error. The disk or driver has a read/write problem. Inaccessible boot device /error/INACCESSIBLE-BOOT-DEVICE/ Windows cannot access the system disk at startup. SSD TRIM not working /error/SSD-TRIM-FAIL/ TRIM for SSD does not work, it reduces the performance and life of the drive. NVMe controller reset /error/NVME-CONTROLLER-RESET/ The NVMe SSD controller has reset due to a communication error. It causes system crashes or data loss. SSD critical wear /error/SSD-WEAR-CRITICAL/ The SSD has reached the critical TBW (Total Bytes Written) wear limit. Risk of failure. Disk read error at startup /error/DISK-READ-ERROR/ Windows reports 'A disk read error occurred' when booting. PC won't boot. Data Redundancy Error (CRC) /error/CRC-DATA-ERROR/ The operating system encountered a Cyclic Redundancy Check error while reading from the file. The data is corrupted and cannot be read. Disk partition converted to RAW format /error/RAW-FILE-SYSTEM/ The disk's file system (NTFS/FAT32) has been corrupted and the system sees it as unformatted (RAW). Data is unavailable. S.M.A.R.T. warning - Impending disk failure /error/SMART-PRE-FAIL/ Self-diagnosis of the disk predicts its early physical end. M.2 NVMe Controller Unexpected Reset /error/NVME-CTL-RST/ The controller on the SSD lost communication and restarted itself (OS crashes). Data transfer error on SATA cable /error/SATA-CRC-ERR/ Data is lost during cable transmission, indicating a damaged connector. Physically bad sectors found on disk /error/BAD-SEC-UNC/ The HDD surface or SSD memory cell has been permanently damaged. Failed to write data from disk cache /error/CACHE-FLSH-FAIL/ The data in the disk cache was not saved before the power failure. Corrupt disk partition table (MBR/GPT) /error/MBR-GPT-CORR/ The system sees the disk as unallocated space with no data. Stuck in the Shadow Copy (Backup) process /error/VSS-FREEZE/ Creating a restore point or backup caused the disk to freeze. TRIM command to clean SSD was ignored /error/TRIM-IGNORE/ The SSD does not clean up the deleted blocks, which reduces the speed extremely. Plate disc spindle motor failure /error/SPN-MOT-FAIL/ The platters of a classic hard disk cannot spin (click). Critical Cell Wear (SSD End of Life) /error/TBW-LIM-RCH/ The SSD has reached the end of its write life (TBW) and has entered read-only mode. Controller overheating on powerful M.2 disk /error/M2-THROTTLING/ The M.2 disk controller is baked under the graphics card, and the speed has dropped to a minimum. Silent Disk Data Corruption (Bit Rot) /error/BIT-ROT-DET/ The data on the disk has naturally degraded, leading to archive file corruption. SSD internal DRAM cache failure /error/DRAM-CAC-FAIL/ A buffer built directly on the disk reports a hardware error. Blocked attempt to securely delete data /error/SEC-ERS-LOCK/ ATA Secure Erase command was rejected by frozen disk security. Loss of NVMe drive PCIe lanes /error/PCIE-LANE-DRP/ M.2 drive running on PCIe x4 suddenly fell into PCIe x1 mode, reading speed dropped drastically. SSD operating temperature warning /error/SSD-TEMP-WARN/ The NVMe or SATA SSD is operating above optimal temperatures. NVMe drive degraded to PCIe x2 speed /error/NVME-PCIE-DEMOTION/ The M.2 SSD runs at half speed due to shared PCIe lanes with the GPU or chipset. SSD DRAM cache failure /error/SSD-DRAM-CACHE-FAIL/ An SSD without a DRAM cache (DRAM-less) is extremely slow when writing large files or reading small files. Chkdsk is stuck on stage 3 or 4 /error/CHKDSK-STAGE3-STUCK/ The chkdsk disk checker is stuck at stage 3 (Security Descriptors) or 4 and is not progressing. BitLocker requires a recovery key after every boot /error/BITLOCKER-RECOVERY-LOOP/ The computer asks for the 48-digit BitLocker key every time it is restarted, even if the password is not changed. DirectX - GPU Removed /error/DXGI-ERROR-DEVICE-REMOVED/ DirectX has lost access to the GPU. The game or application crashes. Direct3D initialization failed /error/D3D-INIT-ERROR/ The application cannot initialize Direct3D. The GPU or driver does not support the required version. Unsupported DirectX Feature Level /error/DIRECTX-FEATURE-LEVEL/ The application requires DirectX Feature Level 11.0 or higher, which is not supported by the GPU. OpenCL initialization failed /error/OPENCL-INIT-FAIL/ An application or software cannot initialize the OpenCL interface for GPU computation. Graphics adapter has been disconnected /error/DXGI-ERROR-DEVICE-REMOVED-2/ The Direct3D device has been removed or the driver has crashed. Video adapter freezing /error/DXGI-ERROR-DEVICE-HUNG-2/ The application sent an invalid command and the GPU became unresponsive. Insufficient graphics memory for DirectX /error/D3D11-ERROR-OUT-OF-MEMORY/ The game or program has exhausted the available VRAM on the graphics card. Invalid call to API function /error/DXGI-ERROR-INVALID-CALL/ The application provided incorrect parameters to DirectX. DX12 compatible GPU not found /error/D3D12-ERROR-ADAPTER-NOT-FOUND/ The application requires DirectX 12 Feature Level, which the graphics card does not support. Image rendering conflict /error/DXGI-ERROR-WAS-STILL-DRAWING/ Attempting to access the surface that the GPU is currently drawing on. Failed to compile HLSL shader /error/D3D-COMPILER-ERROR/ The driver failed to compile the shader program for the graphics card. Unsupported DirectX feature /error/DXGI-ERROR-UNSUPPORTED/ A request has been made for a format or function that the hardware does not support. DirectX resource access denied /error/DXGI-ERROR-ACCESS-DENIED/ The application does not have rights or the resource is exclusively locked by another program. Loss of exclusive full screen mode /error/DXGI-ERROR-NOT-CURRENT/ The game lost focus or was minimized by a system notification. Missing DirectX system library /error/D3D11-ERROR-FILE-NOT-FOUND/ The requested file (eg d3dx11_43.dll) was not found in the system. Changing display mode /error/DXGI-ERROR-MODE-CHANGE-IN-PROGRESS/ Call failure due to resolution or refresh rate change in progress. The Windows version does not support DX12 /error/D3D12-ERROR-NOT-SUPPORTED-OS/ DirectX 12 requires a newer build of Windows 10/11. Internal graphics driver error /error/DXGI-ERROR-DRIVER-INTERNAL-ERROR/ The video card driver encountered an error and could not complete the operation. Failed to initialize D3D device /error/D3D11-CREATE-DEVICE-FAIL/ CreateDevice failed, probably hardware not responding. Unavailability of exclusive access /error/DXGI-ERROR-NONEXCLUSIVE/ An application is trying to gain exclusive access to the screen, but another program already has it. Unsupported Raytracing hardware /error/D3D12-RAYTRACING-UNSUPPORTED/ The game tries to enable DXR (DirectX Raytracing) on ​​a card without RT cores. Break frame statistics /error/DXGI-ERROR-FRAME-STATISTICS-DISJOINT/ The frame rate counter has lost sync. Failed to link shaders /error/D3D-SHADER-LINK-ERROR/ Failed to link shaders due to different registers or HLSL version. DirectX Timeout /error/DXGI-ERROR-WAIT-TIMEOUT/ The application waited too long for a synchronization event from the GPU. DirectX 12 Out of Memory /error/D3D12-ERROR-OUT-OF-MEMORY/ DirectX 12 application failed to allocate sufficient video or system memory. Direct3D 11 Initialization Failure /error/D3D11-CREATE-DEVICE-FAILED/ The application or game could not initialize Direct3D 11. This occurs when the graphics driver is corrupted or the GPU does not support the required DirectX 11 features. VCRUNTIME140.dll is missing /error/VCRUNTIME140-DLL-MISSING/ The application cannot start because the file VCRUNTIME140.dll or MSVCP140.dll is missing. Steam - Error writing to disk during installation /error/STEAM-DISK-WRITE-ERR/ Steam will abort installing or updating a game with a disk write error. EasyAntiCheat - Compliance Violation /error/GAME-EAC-VIOLATION/ The game will kick you out with an EasyAntiCheat violation even though you're not cheating. Error initializing application /error/0xc0000142/ The application failed to start properly (0xc0000142) and will be terminated. The application did not start correctly /error/0xc000007b/ An application built for a 64-bit architecture tries to load a 32-bit library (or vice versa). Missing Visual C++ Runtime /error/VCRUNTIME-MISSING/ The application requires the Visual C++ Redistributable, which is missing. .NET Framework error /error/NET-FRAMEWORK-ERROR/ The application requires the .NET Framework, which is missing or corrupted. DLL file not found /error/DLL-NOT-FOUND/ The application cannot find the required DLL and will not start. Windows Installer error 1603 /error/INSTALLER-ERROR-1603/ Fatal error installing MSI package. Installation failed. Error loading Python DLL /error/PYTHON-DLL-LOAD/ Python cannot load the required DLL (python3xx.dll). The application or script does not start. Missing MSVCR140.dll /error/MSVCR140-MISSING/ The application requires MSVCR140.dll from the Visual C++ 2015-2022 Runtime, which is not installed. Missing or corrupt library ntdll.dll /error/DLL-FAULT-ntdll.dll/ The application could not be started because the ntdll.dll module threw an exception or was not found. Missing or corrupt kernel32.dll library /error/DLL-FAULT-kernel32.dll/ The application could not be started because the kernel32.dll module threw an exception or was not found. Missing or corrupt library user32.dll /error/DLL-FAULT-user32.dll/ The application could not be started because the user32.dll module threw an exception or was not found. Missing or corrupt hal.dll library /error/DLL-FAULT-hal.dll/ The application could not be started because the hal.dll module threw an exception or was not found. Missing or corrupt dxgi.dll library /error/DLL-FAULT-dxgi.dll/ The application could not be started because the dxgi.dll module threw an exception or was not found. Missing or corrupt library d3d11.dll /error/DLL-FAULT-d3d11.dll/ The application could not be started because the d3d11.dll module threw an exception or was not found. Missing or corrupt library xinput1_3.dll /error/DLL-FAULT-xinput1-3.dll/ The application could not be started because the xinput1_3.dll module threw an exception or was not found. Missing or corrupt library msvcp140.dll /error/DLL-FAULT-msvcp140.dll/ The application could not be started because the msvcp140.dll module threw an exception or was not found. Missing or corrupt library vcruntime140.dll /error/DLL-FAULT-vcruntime140.dll/ The application could not be started because the vcruntime140.dll module threw an exception or was not found. Missing or corrupt library ucrtbase.dll /error/DLL-FAULT-ucrtbase.dll/ The application could not be started because the ucrtbase.dll module threw an exception or was not found. Memory Access Violation (STATUS_ACCESS_VIOLATION) /error/STATUS-ACCESS-VIOLATION-2/ A process attempted to read or write to a memory address to which it does not have appropriate access permissions. Extremely common in web browsers (Chrome, Edge) and gaming applications. Loop of reboots after BIOS /error/BIOS-BOOT-LOOP/ The PC restarts in an endless loop after POST. Problem with UEFI boot records or corrupted BCD. UEFI Shell - Startup Error /error/UEFI-SHELL-ERROR/ The system booted into the UEFI shell instead of the OS. The boot record is missing or corrupted. BIOS rollback blocked /error/FIRMWARE-ROLLBACK-BLOCKED/ An attempt to downgrade the BIOS was blocked by board protection or Intel Boot Guard. NVRAM BIOS memory full /error/NVRAM-FULL/ UEFI NVRAM is full of variables. It causes boot problems and the inability to save settings. CSM / Legacy Boot Conflict /error/CSM-CONFLICT/ Compatibility Support Module (CSM) conflicts with UEFI OS or Secure Boot. System stuck in loop into UEFI/BIOS /error/UEFI-BOOT-LOOP/ Every time the PC is started, the system automatically redirects to the BIOS instead of Windows. Conflict between UEFI and old graphics driver /error/CSM-CONFLICT-VGA/ The CSM module has been disabled, but the older graphics card does not have UEFI GOP (Graphics Output Protocol). Violation of Secure Boot rules /error/SEC-BOOT-VIOLATION/ System boot stopped due to unsigned bootloader or driver. Not enough space in the NVRAM chip /error/NVRAM-FULL-ERR/ The NVRAM memory capacity for storing boot variables is full. Drop into the built-in EFI Shell /error/UEFI-SHELL-FALLBACK/ It started the EFI command interface instead of the operating system. Intel ME update failure /error/ME-FW-UPDATE-FAIL/ The Intel Management Engine firmware update failed or was interrupted. AMD AGESA incompatible microcode /error/AMD-AGESA-MICROCODE/ The installed processor is not fully supported by the current version of AGESA libraries in the BIOS. Corruption of ACPI tables /error/ACPI-TABLE-CORRUPT/ Windows BSOD ACPI_BIOS_ERROR due to faulty BIOS power management configuration. Fast Boot Stuck /error/FAST-BOOT-HANG/ The computer won't start because it's stuck in the fast boot phase. Locked by BIOS password /error/BIOS-PWD-LOCKOUT/ Access to the computer is blocked due to an unknown UEFI administrator password. Kernel security check failure /error/KERNEL-SECURITY-CHECK-FAILURE/ Windows has detected corruption of kernel data structures. Most often caused by a faulty driver or memory corruption. Printer is offline /error/PRN-OFFLINE/ Although the printer is turned on and connected, Windows says it is in Offline mode. Access Violation when reading (Access Violation) /error/WIN-APP-CRASH-0xc0000005/ The application crashed with exception code 0xc0000005. This is a general memory access error. Disk usage at 100% in Task Manager /error/DISK-USAGE-100/ The system gets extremely stuck, the response takes seconds, the disk is lit at 100% in the task manager. Your Windows license is about to expire /error/WIN-LICENSE-EXPIRE/ Windows pops up with a message that activation will expire. It also occurs frequently with legal systems of activated organizations (KMS). System memory leak detected /error/MEM-LEAK-SYS/ A critical system process is consuming available memory indefinitely. SYSTEM_THREAD_EXCEPTION_NOT_HANDLED /error/0x0000007E/ A system thread threw an unhandled exception. A very common Windows BSOD caused by drivers. CRITICAL_PROCESS_DIED /error/0x000000EF/ A critical system process (winlogon, csrss, lsass) has terminated. SYSTEM_SERVICE_EXCEPTION /error/0x0000003B/ A system service threw an exception. Caused by drivers or system files. PAGE_FAULT_IN_NONPAGED_AREA /error/0x00000050/ Windows accessed an invalid memory address. Windows activation error /error/0xC004F074/ Windows could not contact the activation server or the key is invalid. Windows Update - Access Denied /error/0x80070005/ Windows Update failed due to permissions or blocking. Error reading kernel data from page /error/KERNEL-DATA-INPAGE-ERROR/ Windows could not retrieve the requested data from the paging file or disk. Typically a disk or RAM problem. DPC Watchdog Violation /error/DPC-WATCHDOG-VIOLATION/ The Deferred Procedure Call was not handled in time. Caused by driver or SSD firmware issues. Unexpected kernel trap /error/UNEXPECTED-KERNEL-MODE-TRAP/ The CPU generated an interrupt that the kernel could not catch. Typically HW error or damaged driver. Memory access violation /error/STATUS-ACCESS-VIOLATION/ The application attempted to access a protected area of ​​memory. Most often an application or driver error. Catastrophic Windows Update Failures /error/0x8000FFFF/ Windows Update encountered an unexpected error and cannot download or install updates. Access Violation - access denied /error/0xC0000005/ The application attempted to access memory to which it does not have access rights. Typical application or driver error. IRQL_GT_ZERO_AT_SYSTEM_SERVICE /error/0x0000004A/ A critical Windows error indicating that a system service was accessed with an IRQL that was too high. 0x0000001E BSOD /error/KMODE-EXCEPTION-NOT-HANDLED/ A kernel process generated an exception that the system could not handle. It usually points to faulty drivers or memory. 0x0000004E PFN List Corrupt /error/PFN-LIST-CORRUPT/ The PFN (Page Frame Number) data structure is corrupted. The system detected an inconsistency in memory. The Windows Update service cannot be started /error/0x80070422/ Windows Update has been disabled or is not working properly. Unable to download updates. STATUS_SYSTEM_PROCESS_TERMINATED /error/0xC000021A/ A critical user subsystem (such as WinLogon or CSRSS) has been critically terminated. The system cannot continue to run. Windows Update Failure (0x80070002) /error/WU-0x80070002/ Windows cannot check for or install updates. Error code: 0x80070002. Windows Update Failure (0x80070057) /error/WU-0x80070057/ Windows cannot check for or install updates. Error code: 0x80070057. Windows Update Failure (0x80004005) /error/WU-0x80004005/ Windows cannot check for or install updates. Error code: 0x80004005. Windows Update Failure (0x80070005) /error/WU-0x80070005/ Windows cannot check for or install updates. Error code: 0x80070005. Windows Update Failure (0x80070422) /error/WU-0x80070422/ Windows cannot check for or install updates. Error code: 0x80070422. Windows Update Failure (0x8009000B) /error/WU-0x8009000B/ Windows cannot check for or install updates. Error code: 0x8009000B. Windows Update Failure (0x80072EE7) /error/WU-0x80072EE7/ Windows cannot check for or install updates. Error code: 0x80072EE7. Windows Update Failure (0x8007001F) /error/WU-0x8007001F/ Windows cannot check for or install updates. Error code: 0x8007001F. Windows Update Failure (0x80070424) /error/WU-0x80070424/ Windows cannot check for or install updates. Error code: 0x80070424. Windows Update Failure (0x80070643) /error/WU-0x80070643/ Windows cannot check for or install updates. Error code: 0x80070643. System Service Crash: Windows Update /error/SVC-FAIL-wuauserv/ The wuauserv service terminated unexpectedly. Services dependent on this process may not work. System Service Crash: BITS Service /error/SVC-FAIL-BITS/ The BITS service has terminated unexpectedly. Services dependent on this process may not work. System service crash: WMI (Winmgmt) /error/SVC-FAIL-Winmgmt/ The Winmgmt service terminated unexpectedly. Services dependent on this process may not work. System Service Crash: Print Spooler Service /error/SVC-FAIL-Spooler/ The Spooler service terminated unexpectedly. Services dependent on this process may not work. System service crashed: Workstation /error/SVC-FAIL-LanmanWorkstation/ The LanmanWorkstation service terminated unexpectedly. Services dependent on this process may not work. System service down: Server /error/SVC-FAIL-LanmanServer/ The LanmanServer service terminated unexpectedly. Services dependent on this process may not work. System Service Crash: Encryption Services /error/SVC-FAIL-CryptSvc/ The CryptSvc service terminated unexpectedly. Services dependent on this process may not work. System Service Crash: Remote Desktop (TermService) /error/SVC-FAIL-TermService/ TermService terminated unexpectedly. Services dependent on this process may not work. System Service Crash: Windows Sound /error/SVC-FAIL-Audiosrv/ The Audiosrv service terminated unexpectedly. Services dependent on this process may not work. System Service Crash: Volume Shadow Copy (VSS) /error/SVC-FAIL-VSS/ The VSS service terminated unexpectedly. Services dependent on this process may not work. DPC_WATCHDOG_VIOLATION /error/0x00000133/ A deferred procedure call (DPC) routine took too long and crashed the system. Windows activation error 0x8007007B /error/0x8007007B/ The filename, directory name, or volume label syntax is incorrect during activation. DRIVER_POWER_STATE_FAILURE /error/0x0000009F/ The driver put the device into an erroneous power state and the system crashed. Windows Defender service disabled /error/0x80070422-3/ The Windows Defender service cannot start, leaving the system vulnerable. SYSTEM_SERVICE_EXCEPTION /error/0x0000003B-2/ An exception occurred while transitioning from unprotected user code to a protected kernel. INACCESSIBLE_BOOT_DEVICE /error/0x0000007B/ Windows lost access to the root system partition during startup. IRQL_NOT_LESS_OR_EQUAL /error/0x0000000A/ A kernel process attempted to access memory at an unauthorized high interrupt level (IRQL). KMODE_EXCEPTION_NOT_HANDLED /error/0x0000001E/ A program running in kernel mode generated an exception that was not caught by the routine code. CRITICAL_PROCESS_DIED /error/0x000000EF-2/ A critical system process (eg svchost, csrss, wininit) terminated unexpectedly. ATTEMPTED_EXECUTE_OF_NOEXECUTE_MEMORY /error/0x000000FC/ An attempt was made to execute code in memory that is marked as 'read only'. PAGE_FAULT_IN_NONPAGED_AREA /error/0x00000050-2/ An error occurred when requesting non-paged memory because the data was not found there. BAD_POOL_CALLER /error/0x000000C2/ The current thread made an invalid request to the memory pool. CRITICAL_STRUCTURE_CORRUPTION /error/0x00000109/ The kernel has detected corruption of key system data or kernel memory structure. VIDEO_TDR_ERROR /error/0x00000116/ An attempt to reset the graphics driver and recover after timeout failed. KERNEL_SECURITY_CHECK_FAILURE /error/0x00000139/ The kernel detected corruption of security-critical data structures. NTFS_FILE_SYSTEM /error/0x00000024/ Fatal error inside NTFS driver. THREAD_STUCK_IN_DEVICE_DRIVER /error/0x000000EA/ A thread has been waiting for a device in hardware state for an infinite amount of time. Windows Update - Service not running /error/0x80070422-2/ Windows Update reports error 0x80070422 and refuses to download updates. Missing Windows Component Files /error/0x80073712/ Windows updates fail with code 0x80073712 due to corrupt or missing component system files. CLOCK_WATCHDOG_TIMEOUT (0x00000101) /error/CLOCK-WATCHDOG-TIMEOUT-2/ The processor waited too long for a response from another processor or core and caused a BSOD. Memory Integrity Protection (HVCI) - incompatible driver /error/MEMORY-INTEGRITY-INCOMP/ Windows Security reports that Memory Integrity Protection is disabled due to an incompatible driver. Windows Defender is stuck scanning /error/WINDOWS-DEFENDER-STUCK/ Windows Defender Antivirus is causing 100% CPU or disk usage and is not responding. Windows Update Error 0x800f0922 /error/WU-0x800f0922/ Windows Update fails to install, typically caused by insufficient space in the System Reserved or EFI System Partition (ESP), Secure Boot configuration conflicts, or active VPN connection blocks. Windows Update Error 0x800f081f /error/WU-0x800f081f/ The source files required for the Windows Update package could not be found, causing installation failure (often occurs during DISM deployment tasks or .NET Framework 3.5 updates). Windows Update Error 0x80070003 /error/WU-0x80070003/ The system cannot find the path specified, preventing Windows Update, Windows Backup, or installer services from accessing the target directories. Windows Update Error 0x80244018 /error/WU-0x80244018/ Connection to the Microsoft update servers is blocked, usually caused by custom proxy servers, custom firewall rules, or stale DNS resolver cache settings. Windows Update Error 0x80070490 /error/WU-0x80070490/ The Component Store or Component-Based Servicing (CBS) manifest file is corrupted, causing Windows Update installation attempts to fail. Windows Update Error 0x800f0988 /error/WU-0x800f0988/ Windows Update fails to install cumulative updates, typically caused by system language pack mismatches, corrupted update package files, or incomplete servicing stack logs. Windows Update Error 0x8007000d /error/WU-0x8007000d/ The update data is invalid. This error indicates that the downloaded update files are incomplete, corrupted, or have failed validation checks. Windows Update Error 0x80073701 /error/WU-0x80073701/ The referenced assembly could not be found. This error indicates missing or corrupted assembly manifest files inside the Windows Component Store (WinSxS). Windows Update Error 0x80240020 /error/WU-0x80240020/ The update installation was blocked or failed to trigger, typically due to upgrade registry locks or incomplete session parameters in the update database. Windows Update Error 0x80246007 /error/WU-0x80246007/ The update failed to download. This error indicates that the Background Intelligent Transfer Service (BITS) has stopped or is misconfigured, preventing file retrieval. Windows Update Error 0x8024402c /error/WU-0x8024402c/ Windows Update connection fails. This error occurs when the update client is unable to connect to the Windows Update servers, usually due to incorrect proxy settings, custom firewall restrictions, or invalid DNS configurations. Windows Update Error 0x80240017 /error/WU-0x80240017/ The update is not applicable to the operating system. This usually happens when the update package architecture does not match your system (e.g. 64-bit update on 32-bit OS) or prerequisite updates are missing. Windows Update Error 0x800b0100 /error/WU-0x800b0100/ No signature was present in the subject. This error indicates that the downloaded update files are missing digital signatures or have been corrupted, causing trust verification to fail. Windows Update Error 0x80070bc2 /error/WU-0x80070bc2/ A system restart is required to complete the installation of the update. The update installation enters a loop where it continually requests a reboot without completing. Windows Update Error 0x80070020 /error/WU-0x80070020/ The process cannot access the file because it is being used by another process. This occurs when Windows Update attempts to modify or copy critical system files that are locked by a background program or third-party security software. Windows Store Game License Error 0x803f8001 /error/0x803f8001/ This error indicates a licensing or digital rights validation issue when launching or downloading games and apps from the Microsoft Store or Xbox App (such as Minecraft or Xbox Game Pass titles). The system cannot verify that your account owns the product license. Windows Update Error 0x80080005 /error/0x80080005/ This error occurs when the Windows Update client fails to execute because the background service or security catalog database is corrupted, preventing Windows from downloading updates. Windows Update Connection Timeout 0x80072efd /error/0x80072efd/ This error indicates that the Windows Update service encountered a network connection timeout while trying to reach Microsoft's update servers, usually caused by network filters, firewalls, or proxy settings. Windows Module Load Failure 0x8007007e /error/0x8007007e/ The specified module could not be found. This error commonly occurs during Windows Updates, system service operations, or application launches when a critical DLL dynamic link library or driver component is missing. Windows Update SOAP Client Error 0x80244007 /error/0x80244007/ SOAP client failed. This error is triggered during Windows Update scans when SOAP (Simple Object Access Protocol) XML messages are blocked or misformatted, often due to server-side session timeouts or proxy interference. Windows Update Repair Failure (0x800F081F) /error/0x800F081F/ This error is triggered when Windows Update or the DISM tool cannot locate the required source files to complete a system repair or component installation. Windows Update File Failure (0x80070002) /error/0x80070002/ This error occurs when Windows Update or an installer attempts to access a critical installation file that has been deleted, moved, or corrupted. Windows Update Forbidden (0x80244018) /error/0x80244018/ Windows Update connection was blocked by a proxy, firewall, or gateway, returning an HTTP 403 Forbidden status code. Windows Update Error 0x80070643 (WinRE size too small) /error/0x80070643/ This error is triggered when Windows Update fails to install the recovery partition update (often KB5034441) due to the Windows Recovery Environment (WinRE) partition size being too small. Windows Update Error 0x800f0922 (Secure Boot / Space Issue) /error/0x800f0922/ This error is triggered when Windows Update fails to install due to a secure boot configuration mismatch, insufficient system reserved partition space, or a connection failure to Microsoft servers. Windows Update Error 0x80240034 (Download Database Fail) /error/0x80240034/ This error occurs when the Windows Update client fails to download the update package because the download transaction metadata or database state is corrupted. Windows Update Error 0x80246007 (Download Interrupted) /error/0x80246007/ This error indicates that the update download was interrupted unexpectedly. This is typically related to background intelligent transfer service (BITS) dropouts or network conflicts.