
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...

If Windows Defender or another security tool is acting up—showing stale alerts, failing to update...

When you try to run the Outlook offline installer on Windows 10, you might see a 'permission deni...

You open Outlook in Microsoft 365 and see a '404 Not Found' page. This usually means Outlook can'...

You try to check for Windows updates and see an error like “Authentication failed” or “Password i...

After a Windows update, you might open Microsoft Store and see a 404 Not Found error when trying ...