
Windows Defender Authentication Failed: Step-by-Step Checklist
You open Windows Security and see 'Authentication failed' when trying to use Windows Defender. Th...
Software troubleshooting desk

You open Windows Security and see 'Authentication failed' when trying to use Windows Defender. Th...

You open Windows Security and see a red banner: “Windows Security service is not running.” Or you...

You see error 0x8007042c when opening Windows Defender or during a scan. The message usually says...

When connecting to a remote desktop, you may see an error message like "Your session has ended be...

If you're seeing a "502 Bad Gateway" or "Gateway Timeout" when trying to connect to a remote desk...

You try to activate Windows, but after a long wait you get a connection timeout error. Often the ...