Windows & BSOD errors
118 errors. Choose the message that matches your computer.
Windows errors include blue screen stop codes, Windows Update failures and startup problems. Start with the exact code or message; the overview pages group them by cause.
Blue screen errors → · Windows Update errors → · PC won't start →
PRN-OFFLINE
Windows shows the printer as Offline, and print jobs stay in the queue instead of printing. The printer is usually fine; Windows simply cannot reach it.
Windows & BSOD0x000000EF
Windows stopped because a system process it cannot run without ended unexpectedly. These processes manage things like sign-in, sessions and system services, so Windows treats their loss as fatal and restarts.
Windows & BSOD0x00000050
Windows stopped because it tried to use system memory at an address that is not valid, usually a wrong address or memory that was already freed. Microsoft lists three main sources: a faulty driver or system service,…
Windows & BSODKERNEL_DATA_INPAGE_ERROR
Windows stopped because it could not read a page of its own kernel data back from the paging file on the drive into memory. Microsoft's list of causes points mostly at storage: bad sectors on the drive, a loose or…
Windows & BSODDPC_WATCHDOG_VIOLATION
Windows stopped because a driver held the processor for too long. Drivers handle hardware events in short, high-priority routines (deferred procedure calls, DPCs), and a watchdog in Windows triggers this stop code…
Windows & BSODUNEXPECTED_KERNEL_MODE_TRAP
Windows stopped because the processor raised an error (a trap) inside the Windows kernel that the kernel could not handle. A common example is a double fault: an error that happens while the processor is already…
Windows & BSODKMODE_EXCEPTION_NOT_HANDLED
Windows stopped because a program running in kernel mode, almost always a driver or system service, caused an error that nothing caught. Microsoft lists three main sources: a faulty device driver or system service,…
Windows & BSOD0x80070422
Windows Update cannot start because a service it needs is disabled. Microsoft's name for the code is ERROR_SERVICE_DISABLED, and for Windows Update it means the Windows Update service stopped working or isn't running.
Windows & BSODWU-0x80070002
A Windows update fails with 0x80070002. Microsoft's name for the code is ERROR_FILE_NOT_FOUND, "The system cannot find the file specified", and lists it among Windows Update corruption errors.
Windows & BSODWU-0x80070005
A Windows update fails with 0x80070005, E_ACCESSDENIED. Microsoft explains that the update process could not access required files, folders or registry entries.
Windows & BSODWU-0x80070643
An update fails with 0x80070643, which is the Windows Update form of installer error 1603, ERROR_INSTALL_FAILURE: an installation failed. The code is generic, so the update's name matters.
Windows & BSOD0x0000000A
Windows stopped because a driver or Windows itself accessed memory at an invalid address while running at a raised priority level (IRQL). The cause is typically a bad memory pointer in a driver.
Windows & BSOD0x000000FC
Windows stopped because a driver tried to run code from memory that is marked as data only (non-executable). The processor's No-Execute protection blocks this, because running code from data memory is how both buggy…
Windows & BSOD0x000000C2
Windows stopped because a driver made an invalid request for kernel memory, such as freeing the same memory twice. Requesting memory at a priority level where that is not allowed causes it too.
Windows & BSOD0x80073712
Windows Update cannot install an update because the component store is damaged. The component store (the WinSxS folder) holds the files Windows uses to install updates and features, and Microsoft names this code…
Windows & BSOD0x80072efd
Windows Update could not reach Microsoft's servers because the connection timed out. Microsoft groups 0x80072EFD with other time-out errors and says the fix is to make sure no firewall rules or proxies block…
Windows & BSOD0x800F081F
Windows shows 0x800F081F when it needs repair or feature files and cannot find usable ones. Microsoft names it CBS_E_SOURCE_MISSING: the source path does not contain the files, you lack read access to it, or the…
Windows & BSOD0x800f0922
An update or Windows feature fails to install with 0x800F0922. Microsoft's name for the code is CBS_E_INSTALLERS_FAILED: one of the installers in the servicing process failed, and the update rolls back.
Windows & BSODBLUETOOTH-AUDIO-STUTTER
Bluetooth headphones, speakers or other devices keep disconnecting, or the sound stutters and cuts out. Microsoft says disconnections are often caused by power-saving settings, outdated drivers or temporary glitches.
Windows & BSODBLUETOOTH-PAIRING-FAIL
Windows does not find a Bluetooth device, pairing fails, or a paired device shows as paired but will not connect. Bluetooth itself is working on the PC, but the connection with this device does not succeed.
Windows & BSODEVENT-ID-41-KERNEL-POWER
Event Viewer shows a critical Kernel-Power event 41 after the PC restarted or shut off on its own. Its text is "The system has rebooted without cleanly shutting down first", and Event ID 6008 (an unexpected previous…
Windows & BSODUSB-DEVICE-NOT-RECOGNIZED
Windows shows "USB device not recognized" when you plug in a device, and the device does not work. In Device Manager it may appear as Unknown USB Device with a yellow warning sign.
Windows & BSODWU-0x80070020
A Windows update fails with 0x80070020. Microsoft's name for the code is ERROR_SHARING_VIOLATION: the process cannot access a file because another process is using it.
Windows & BSODWU-0x80070490
Windows Update fails with 0x80070490. Microsoft's name for the code is ERROR_NOT_FOUND: something Windows needed for the update was not found.
Windows & BSODWU-0x8024402c
Windows Update could not look up the address of Microsoft's update servers or of the proxy server it is set to use. Microsoft names 0x8024402C WU_E_PT_WINHTTP_NAME_NOT_RESOLVED: the proxy server or target server name…
Windows & BSODKERNEL_SECURITY_CHECK_FAILURE
Windows stopped because the kernel found that one of its critical internal data structures had been corrupted. Windows checks these structures on purpose and stops rather than continue with damaged data.
Windows & BSODFAULTY_HARDWARE_CORRUPTED_PAGE
Windows stopped because its memory manager found memory corruption caused by hardware or a driver writing to memory directly. Microsoft says such corruption can only come from access by physical address, not through…
Windows & BSOD0xC000021A
Windows stops with code 0xC000021A, often during startup or right after an update. Microsoft names this bug check WINLOGON_FATAL_ERROR: a user-mode subsystem that Windows cannot run without, such as Winlogon or the…
Windows & BSODBOOTMGR-MISSING
Instead of starting Windows, the PC shows a black screen saying that BOOTMGR is missing and asking you to press Ctrl+Alt+Del to restart. BOOTMGR is the Windows Boot Manager on PCs that start in legacy BIOS mode.
Windows & BSOD0xc0000034
Windows does not start and shows a blue Recovery screen with error code 0xc0000034. Microsoft's name for this code is STATUS_OBJECT_NAME_NOT_FOUND: the Windows Boot Manager looked for something it needs and could not…
Windows & BSOD0x80070057
0x80070057 means that a Windows component received a value it could not use. Microsoft's name for it is ERROR_INVALID_PARAMETER, "The parameter is incorrect" (programs also call it E_INVALIDARG).
Windows & BSOD0x80070070
A Windows update fails with 0x80070070, ERROR_DISK_FULL: there is not enough space on the disk. Microsoft says quality updates typically need 2–3 GB or more of free space and feature updates 6–11 GB or more, and a…
Windows & BSODDISK-USAGE-100
The system gets extremely stuck, the response takes seconds, the disk is lit at 100% in the task manager. It's most often caused by sysMain (SuperFetch) or Windows Search aggressively index and corrupt paging file.
Windows & BSODWIN-LICENSE-EXPIRE
Windows pops up with a message that activation will expire. It also occurs frequently with legal systems of activated organizations (KMS).
Windows & BSODMEM-LEAK-SYS
A critical system process is consuming available memory indefinitely. The usual suspects are faulty driver (Non-paged pool leak) and buggy background service.
Windows & BSOD0xC004F074
Windows could not contact the activation server or the key is invalid. Typical causes include hardware change and offline PC.
Windows & BSODSTATUS_ACCESS_VIOLATION
The application attempted to access a protected area of memory. Most often an application or driver error.
Windows & BSOD0x8000FFFF
Windows Update encountered an unexpected error and cannot download or install updates. This usually traces back to stopped BITS service and not enough disk space.
Windows & BSOD0xC0000005
The application attempted to access memory to which it does not have access rights. Typical application or driver error.
Windows & BSOD0x0000004A
A critical Windows error indicating that a system service was accessed with an IRQL that was too high. This usually traces back to incompatible software (antivirus, firewall) and bad device driver.
Windows & BSODPFN_LIST_CORRUPT
The PFN (Page Frame Number) data structure is corrupted. The system detected an inconsistency in memory.
Windows & BSODWU-0x80004005
Windows cannot check for or install updates. Error code: 0x80004005.
Windows & BSODWU-0x8009000B
Windows cannot check for or install updates. Error code: 0x8009000B.
Windows & BSODWU-0x8007001F
Windows cannot check for or install updates. Error code: 0x8007001F.
Windows & BSODWU-0x80070424
Windows cannot check for or install updates. Error code: 0x80070424.
Windows & BSODSVC-FAIL-wuauserv
The wuauserv service terminated unexpectedly. Services dependent on this process may not work.
Windows & BSODSVC-FAIL-BITS
The BITS service has terminated unexpectedly. Services dependent on this process may not work.
Windows & BSODSVC-FAIL-Winmgmt
The Winmgmt service terminated unexpectedly. Services dependent on this process may not work.
Windows & BSODSVC-FAIL-Spooler
The Spooler service terminated unexpectedly. Services dependent on this process may not work.
Windows & BSODSVC-FAIL-LanmanWorkstation
The LanmanWorkstation service terminated unexpectedly. Services dependent on this process may not work.
Windows & BSODSVC-FAIL-LanmanServer
The LanmanServer service terminated unexpectedly. Services dependent on this process may not work.
Windows & BSODSVC-FAIL-CryptSvc
The CryptSvc service terminated unexpectedly. Services dependent on this process may not work.
Windows & BSODSVC-FAIL-TermService
TermService terminated unexpectedly. Services dependent on this process may not work.
Windows & BSODSVC-FAIL-VSS
The VSS service terminated unexpectedly. Services dependent on this process may not work.
Windows & BSOD0x000000EA
A thread has been waiting for a device in hardware state for an infinite amount of time. Common triggers are typically the graphics or sound card driver has looped and bad power profile activated.
Windows & BSODMEMORY-INTEGRITY-INCOMP
Windows Security reports that Memory Integrity Protection is disabled due to an incompatible driver. Another common trigger is cheating software or old anti-cheat.
Windows & BSODWINDOWS-DEFENDER-STUCK
Windows Defender Antivirus is causing 100% CPU or disk usage and is not responding. Typical causes include security definitions not updated and exception for system folders is not set.
Windows & BSOD0x00000709
Windows cannot set the default printer or connect to a network printer. The usual suspects are registry key restriction and driver mismatch.
Windows & BSOD0x8007007e
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 & BSOD0x8007045D
Request could not be performed because of an I/O device error. Often indicates failing sectors.
Windows & BSOD0x800704cf
The network location cannot be reached. Error occurs when trying to sign in to Microsoft services or access network drives.
Windows & BSOD0x80080005
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. Another common trigger is…
Windows & BSOD0x800f0988
Windows cumulative updates fail to install with error code 0x800f0988, which points to corrupted component files in the Windows Side-by-Side (WinSxS) repository. The steps below are ordered to resolve this efficiently.
Windows & BSOD0x80240034
This error occurs when the Windows Update client fails to download the update package because the download transaction metadata or database state is corrupted. Work through the steps below in order.
Windows & BSOD0x80244007
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 & BSOD0x80244018
Windows Update connection was blocked by a proxy, firewall, or gateway, returning an HTTP 403 Forbidden status code. It sometimes comes down to corrupted software distribution directory files.
Windows & BSOD0x80246007
This error indicates that the update download was interrupted unexpectedly. This is typically related to background intelligent transfer service (BITS) dropouts or network conflicts.
Windows & BSOD0x803f8001
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…
Windows & BSOD802-1X-AUTH-FAIL
Cannot connect to corporate or university Wi-Fi that uses 802.1X (RADIUS) authentication. Windows prompts for credentials repeatedly.
Windows & BSODAUDIO-RENDERER-ERR
Browser (Chrome/Edge) reports 'Audio renderer error' and cannot play media until restarted. Another common trigger is exclusive mode lock by another application.
Windows & BSODCPU-FAN-ERROR
The motherboard BIOS cannot detect a CPU fan signal during POST. System may refuse to boot to protect the CPU.
Windows & BSODDIRECTSTORAGE-NOT-SUPPORTED
A game requires DirectStorage (GPU decompression) but it is not available, causing long load times or a launch failure. It's also often linked to windows 10 version below 1903 or Windows 11 required for full GPU path.
Windows & BSODHYPER-V-MEM-OVERCOMMIT
A Hyper-V VM crashes or Windows host becomes unresponsive due to memory overcommitment. Use the steps below to track down and fix the cause.
Windows & BSODOPENGL-INVALID-OPERATION
An OpenGL command was issued that is not valid for the current OpenGL state. Application may crash or render incorrectly.
Windows & BSODPOWERCFG-HIGH-DRAIN
Laptop battery discharges significantly faster than expected, even in sleep/standby mode. Another common trigger is high background CPU usage (Windows Search, Defender).
Windows & BSODSLEEP-WAKE-FAIL
The computer appears to enter sleep/standby but cannot wake up. Requires hard reset.
Windows & BSODSMB-SIGN-MISMATCH
Cannot connect to a Windows file share. Error: 'The network path was not found' or 'Access denied' due to SMB signing policy conflict.
Windows & BSODSPATIAL-SOUND-FAIL
Spatial sound format (Windows Sonic, Dolby Atmos, DTS) fails to activate or produces distorted output. It's also often linked to exclusive mode conflict.
Windows & BSODSTORAGE-SPACES-DEGRADED
A Storage Spaces pool is in a degraded state because one or more member drives failed or disconnected. The usual suspects are SATA/USB connection lost and disk firmware bug causing disconnection.
Windows & BSODTASK-SCHEDULER-ERR
A Windows Task Scheduler task runs but exits with return code 0x1 (general error) or 0x41301 (task is running). Another common trigger is 'Run only when user is logged on' vs 'Run whether user is logged on or not'…
Windows & BSODVULKAN-ERROR-OUT-OF-DATE-KHR
The Vulkan surface has changed (window resize, alt-tab) and the swapchain needs to be recreated. Games may crash instead of handling this.
Windows & BSODVULKAN-VALIDATION-ERROR
Vulkan validation layers report API usage errors. Usually only visible to developers but can cause crashes in debug builds.
Windows & BSODWINDOWS-ROLLBACK-STUCK
After a failed Windows update, the system is stuck at 'Reverting changes – Do not turn off your computer' for over an hour. It's also often linked to slow or failing storage drive.
Windows & BSODWSL2-NETWORK-BROKEN
After the PC wakes from sleep, WSL2 has no internet connectivity. DNS fails and ping fails inside the subsystem.
Windows & BSODWU-0x8007000d
The update data is invalid. This error indicates that the downloaded update files are incomplete, corrupted, or have failed validation checks.
Windows & BSODWU-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 & BSODWU-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 & BSODWU-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 & BSODWU-0x80240020
The update installation was blocked or failed to trigger, typically due to upgrade registry locks or incomplete session parameters in the update database. Work through the steps below in order.
Windows & BSOD0x8007007B
The filename, directory name, or volume label syntax is incorrect during activation. Reports of Windows activation error 0x8007007B usually describe a sudden crash, brief unresponsiveness, or a stop-code screen…
Windows & BSOD0x80070422
The Windows Defender service cannot start, leaving the system vulnerable. It's also often linked to third-party antivirus interference.
Windows & BSOD0xC0000428
Error code 0xC0000428 indicates that Windows Boot Manager could not verify the digital signature of a recently installed driver or system file. This prevents Windows from starting up properly.
Windows & BSODREGISTRY_ERROR
The REGISTRY_ERROR bug check has a value of 0x00000051. This BSOD indicates that an I/O error occurred while the registry was trying to read one of its files, or that the registry has become corrupted due to hardware…
Windows & BSOD0x8024200B
A common Windows Update error code indicating that a driver or system file update could not be applied because the active device driver in the system is locked, corrupted, or has a signature mismatch. Use the steps…
Windows & BSODKERNEL_AUTO_BOOST_LOCK_ACQUISITION_WITH_RAISED_IRQL
This BSOD occurs when a driver attempts to acquire a kernel auto-boost lock while operating at an elevated IRQL (Interrupt Request Level). This violates Windows kernel locking rules.
Windows & BSODWINDOWS-ACTIVATION-ERROR-0x803F7001
Windows cannot activate online and displays error 0x803F7001 (HRESULT: No valid Windows license found). This commonly occurs after significant hardware changes (motherboard replacement), when a digital license is not…
Windows & BSOD0x000000F4
A critical system process or thread was terminated unexpectedly, causing the system to halt. This can also stem from SATA/NVMe controller connection issue.
Windows & BSODEvent ID 7034
A registered Windows system service terminated unexpectedly. It's also often linked to software conflicts or crashed processes.
Windows & BSODBSOD on install
A blue screen of death (BSOD) crash occurs during the Windows installation process, preventing the setup from completing. It's most often caused by defective or unstable RAM modules and incorrect storage controller…
Windows & BSOD0x00000119
The video scheduler has detected a fatal violation in the display driver. Caused by graphics driver corruption, memory leaks or faulty GPU hardware.
Windows & BSOD0x00000154
The store component has thrown an unexpected exception. Caused by hard drive failure, SSD controller timeout, or corrupted system files.
Windows & BSOD0x000001D5
The Plug and Play (PnP) manager failed to initialize a driver within the timeout limit. Caused by incompatible hardware drivers, corrupt system files, or BIOS settings.
Windows & BSOD0x80070003
The system cannot find the path specified. This error is most commonly encountered during failed Windows Update updates, store app installations, or profile migrations due to missing directory links.
Windows & BSOD0x80070017
A Cyclic Redundancy Check (CRC) error indicates that the operating system was unable to read data from a storage sector or installation media. Most commonly encountered during Windows installation, updates, or file…
Windows & BSOD0x000000C1
A special pool driver check detected that a kernel driver wrote to memory outside its allocated block. This is a critical RAM integrity BSOD.
Windows & BSOD0x80242006
The update handler failed to complete the installation process due to database corruption or service blocks. Commonly encountered during cumulative updates or security definition updates.
Windows & BSOD0x00000100
A Loader Block Mismatch occurs when the boot loader (Winload.efi) passes a system parameters block to the Windows kernel that is incompatible or corrupted. Commonly caused by corrupted boot records, memory faults, or…
Windows & BSOD0x80070091
The directory is not empty. Commonly occurs during failed System Restore operations or when attempting to delete Windows.old or app folders.
Windows & BSOD0x80004005
This is a generic Windows error code representing access denied, missing permissions, or registry blocks. Most commonly occurs during Windows update, networking/sharing folder setup, or virtual machine launching.
Windows & BSOD0x00000078
An unhandled exception occurred during the early boot phase (Phase 0 initialization). Commonly caused by unstable hardware overclocking, outdated CPU microcode, or incompatible RAM memory blocks.
Windows & BSOD0x80073CF9
The app package installation failed due to missing package directories or corrupted store database records. Commonly occurs when updating or installing games/applications from the Microsoft Store.
Windows & BSOD0x0000003D
A hardware interrupt was generated, but the kernel interrupt handler threw an unhandled exception. Commonly caused by driver memory violations, faulty motherboard chipset wiring, or BIOS settings.
Windows & BSOD0x800F0900
The CBS manifest file parsing failed due to corruption in the servicing stack directory. Commonly encountered during cumulative updates, Windows features activation, or DISM restore health execution.
Windows & BSOD0x8007000E
The system has run out of memory (RAM/virtual memory) required to process update downloads, allocate handles, or parse packages. Most commonly occurs during cumulative updates on systems with low physical RAM,…
Windows & BSOD0x800B0109
A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider. Commonly occurs during Windows Update downloads, driver installation, or app installation when registry…
Windows & BSOD0x80073D05
The application installation failed because the previously deleted application's data directory was not fully cleared or is locked. Commonly encountered when trying to reinstall Microsoft Store apps like Xbox,…
Windows & BSOD0x8024401F
The Windows Update client received an HTTP status 500 (Internal Server Error) response from the update server or local WSUS gateway. Commonly occurs due to server-side congestion, proxy server misconfigurations, or…
Windows & BSOD0xC0000006
An in-page read error occurred, meaning the system tried to load a file from memory but failed due to read/write hardware timeouts. Commonly occurs when launching games/apps from external drives or network shares.