
Windows Defender Troubleshooting Checklist
Windows Defender (now Microsoft Defender Antivirus) usually runs quietly in the background, but s...

Windows Defender (now Microsoft Defender Antivirus) usually runs quietly in the background, but s...

You open the Microsoft Store, try to sign in, and get an authentication failed error. This can ha...

You open Microsoft Teams and get a 404 Not Found error. The app may load partially or show a blan...

After restoring Microsoft Teams from a backup or system restore, you might notice contacts missin...

You try to reset Remote Desktop settings—maybe after a configuration error or a failed connection...

If Windows Update fails with errors like 0x80070422 or the service won't start, the service might...