
Fix Windows Defender Connection Refused or Permission Denied Errors
If you see "connection refused" or "permission denied" when trying to start or update Windows Def...
Software troubleshooting desk

If you see "connection refused" or "permission denied" when trying to start or update Windows Def...

You open Windows Security and see a 502 Bad Gateway error when it tries to sync. This usually mea...

When you run the Windows Update offline installer (the .msu file) and get a network error, it usu...

When Outlook throws a 504 gateway timeout error, it usually means the server your client is tryin...

When you see 'Permission denied' in Windows Terminal, it usually means the terminal lacks the nec...

You might need to reset Windows Defender (now Microsoft Defender Antivirus) to its default settin...