
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 ...

You try to unlock a BitLocker drive or change encryption settings and get an error like "invalid ...

You try to install or run a Chrome extension, and you get a 'permission denied' error. This usual...

You open Outlook and get: "Outlook data file cannot be accessed. Check permissions."

After a recent Windows update, you may see a 'permission denied' error when trying to connect to ...

You're looking for something on your Mac that works like Windows Security—the built-in antivirus,...