
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 10 update, you might open Outlook only to see a blank window—no folders, no email...

If Outlook is using 90-100% CPU and becomes unresponsive or freezes, it's usually due to a corrup...

You try to open a password-protected .7z or .zip file with 7-Zip and get the error 'Cannot open a...

You see error 0x80073cf0 when trying to install or update an app from the Microsoft Store. The me...

If you see that Windows Security's real-time protection is stuck off and won't turn on, you're no...