
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 ...

After a Windows update, you might see a BitLocker error like "A compatible Trusted Platform Modul...

You open the Microsoft Store and see nothing but a blank white or gray screen. Other apps—Edge, O...

If you see error 0x800f0831 while trying to update Windows on a metered connection, it usually me...

If you see "Microsoft Store failed to start" with a "Permission denied"<...

If you need to run Windows Defender scans or update definitions from the command line, you'll use...