
Windows Defender Connection Refused: Troubleshooting Checklist
You open Windows Security and see "Connection refused" or "Something went wrong. Try reopening Wi...

You open Windows Security and see "Connection refused" or "Something went wrong. Try reopening Wi...

You click "Check for updates" and see error 0x80072F0D or a message like "A certificate chain pro...

You see a OneDrive sync error that says "file in use" or "the file is open in another program." T...

If you see a 502 Bad Gateway error when BitLocker tries to contact a network unl...

After a Windows update, you might see errors like "The configuration is invalid" or "Invalid comm...

You're trying to delete a file in Windows, but you get an error saying the file is open in 'comma...