
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 ...

After a Windows update, you might see SSL certificate errors in browsers, email clients, or other...

If you see "port already allocated" when trying to run Windows Defender from the command line, it...

You open Chrome, try to load a site, and get "This site can’t be reached" or "Connection timed ou...

If you see a "task scheduler version mismatch" error when trying to import or run a scheduled tas...

When Windows Search fails with an error like “Path not found” in the registry, it usually means a...