Network errors
27 errors. Choose the message that matches your computer.
Network errors cover Wi-Fi without internet, DNS failures, Bluetooth and Windows Update connection errors. Testing another device on the same network shows whether the PC or the network is the problem.
NET-WIFI-NO-INTERNET
Windows shows that it is connected to the Wi-Fi network, often as "No internet, secured" or with a globe or warning icon, but websites do not load. The PC reaches the router, but traffic does not get through to the…
NetworkWINSOCK-CORRUPT
Windows Sockets (Winsock) is the part of Windows that programs use to make network connections, and TCP/IP is the protocol underneath it. When their settings are damaged, typically after removing a VPN, proxy tool or…
NetworkWIFI_AUTOPREP_FAIL
Wi-Fi disappears from Windows, and trying to start the WLAN AutoConfig service shows "Error 1068: The dependency service or group failed to start". WLAN AutoConfig (WlanSvc) is the service that finds and connects to…
NetworkDNS_PROBE_FINISHED_NXDOMAIN
Chrome or Edge shows "This site can't be reached" with DNS_PROBE_FINISHED_NXDOMAIN. The browser asked a DNS server for the website's address, and the answer was NXDOMAIN, which means the name does not exist.
NetworkERR-SSL-PROTOCOL-ERR
The browser refuses to load the web page due to an HTTPS/SSL error. Typical causes include the date and time are incorrectly set on the computer, anti-virus programs (e.g.
NetworkNETIO-ERROR
A network driver or hardware caused an I/O communication error. It's also often linked to damaged ethernet cable or faulty port.
NetworkWIFI-DRIVER-CRASH
The wireless network adapter has stopped responding or is disconnecting. The usual suspects are outdated Wi-Fi driver, 2.4GHz channel interference, problem with Power Management and overheated Wi-Fi module.
NetworkSSL-HANDSHAKE-FAIL
The browser or application cannot establish an encrypted HTTPS connection. The usual suspects are bad system time, obsolete root certificates, firewall blocking TLS and antivirus SSL scan.
NetworkGATEWAY-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). It's also often linked to incorrectly set static IP address in PC.
NetworkIP-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.
NetworkDHCP-TIMEOUT
The computer connected to the network, but the router did not assign an IP address to it. It's also often linked to ISP Provider Error.
NetworkIPV6-LOOP
Packets in an IPv6 network go around in a loop and never reach their destination. Common triggers are ISP Provider Error, stuck Router and IP address conflict.
NetworkWLAN-RST-LOOP
The Wi-Fi card keeps disconnecting and restarting due to a driver error. Typical causes include stuck Router and IP address conflict.
NetworkCBL-UNPL-FLS
The NIC reports 'Cable disconnected' even though the cable is physically plugged in. Common triggers are ISP Provider Error, corrupt network card driver, stuck Router and IP address conflict.
NetworkMAC-CONFLICT
Two devices on the network share the same physical MAC address. It's most often caused by ISP Provider Error and stuck Router.
NetworkVPN-TUN-DROP
The encrypted VPN connection was unexpectedly terminated by the firewall. Common triggers are ISP Provider Error, corrupt network card driver, stuck Router and IP address conflict.
NetworkQOS-THROTTLE
Quality of Service on the router or in Windows inadvertently limits the speed to a fraction of the maximum. Common triggers are ISP Provider Error, corrupt network card driver and IP address conflict.
NetworkIGMP-SNP-FAIL
A local switch or router does not properly filter multicast traffic, IPTV is interrupted. Typical causes include ISP Provider Error, corrupt network card driver and IP address conflict.
NetworkARP-POISON
An attempted Man-In-The-Middle attack has been detected on your network. Common triggers are ISP Provider Error, stuck Router and IP address conflict.
NetworkPRX-DET-STLL
The computer is stuck detecting proxy settings and is blocking web traffic. This usually traces back to ISP Provider Error, corrupt network card driver and IP address conflict.
NetworkMTU-MISMATCH
Different Maximum Transmission Unit settings cause fragmentation and brutal network slowdown. Typical causes include ISP Provider Error, stuck Router and IP address conflict.
NetworkNET-DHCP-LEASE
The system failed to renew its IP address from the DHCP server. This can also stem from network switch misconfiguration.
NetworkIPV6-LEAK-TUNNEL
Windows automatically creates a 6to4 or Teredo tunnel for IPv6, which causes the connection to slow down or fail. Work through the steps below in order.
NetworkDNS-REBINDING-ATTACK
The web browser or DNS cache has been poisoned, causing redirects to bad websites. The usual suspects are infected router with fake DNS records, malware modifying hosts file and public WiFi hotspot with manipulated DNS.
NetworkWIFI-DRIVER-BSOD
The wireless network adapter driver (commonly Intel AX series or Realtek RTL) causes a Blue Screen of Death. This typically manifests as SYSTEM_THREAD_EXCEPTION_NOT_HANDLED or DRIVER_IRQL_NOT_LESS_OR_EQUAL pointing…
NetworkNETWORK-BOOT-FAIL
The system is attempting to boot from the network via PXE (Preboot Execution Environment) and failing, resulting in delays or 'BOOTMGR is missing' errors. This occurs when the network adapter is set as the first boot…
NetworkIPV6-CONNECTIVITY-FAIL
The system has no IPv6 connectivity while IPv4 functions normally. Modern applications and services increasingly require IPv6 (Microsoft services, Google, gaming platforms).