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

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

If you see a proxy error in Microsoft Store, the app can't connect to the internet. This usually ...

If you notice that BitLocker is using a lot of memory (RAM) on a system with a large drive (e.g.,...

You see a "version mismatch" error when opening a scheduled task that was created on a different ...

If Outlook stops syncing email, calendar, or contacts after an update or add-in installation, a d...

When you try to run Enter-PSSession or Invoke-Command and get a