
Windows Defender Service Troubleshooting Checklist
If Windows Defender won't start, won't update, or shows error messages like "Service stopped" or ...

If Windows Defender won't start, won't update, or shows error messages like "Service stopped" or ...

When you see 'Windows Terminal Service Unavailable Permission Denied', it usually means the Remot...

You try to open Windows Security or change a setting, and you get an "Access Denied" message. Thi...

You open Windows Security and see a message about a version mismatch, or the Security Center serv...

When you try to back up files using Windows Security (Windows Defender) or the built-in backup to...

You try to open Windows Defender Security Center or run a scan, and you get a 'permission denied'...