
Fix Windows Defender Authentication Failed After Update
After a recent Windows update, you might see an error like "Authentication failed" when trying to...
Software troubleshooting desk

After a recent Windows update, you might see an error like "Authentication failed" when trying to...

If you see 'token expired' in Windows Terminal, it means the authentication token for a service (...

If your Outlook for Mac calendar isn't syncing with Exchange, iCloud, or other accounts, you're n...

You run Disk Cleanup, check "Windows Update Cleanup", but nothing happens—or the option is missin...

You try to open a file and see a message like "The file is locked" or "Access denied." Sometimes ...

If you see "port already allocated permission denied" when running Windows Update, it usually mea...