
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 notice your laptop fan spinning loudly and the CPU pegged at 100% in Task Manager. OneDrive i...

If you notice that BitLocker is using a lot of memory on Windows 11—sometimes over 1 GB—it can sl...

If you're running Windows software on Ubuntu via a virtual machine or Wine, you may need to insta...

You open Windows Defender Security Center or try to run a scan, and you see an error: Pat...

If you've bought a new computer and want to move your existing Windows license, the process depen...