
Fix Windows Defender Service Not Starting (Error 404)
If you see error 404 when trying to start Windows Defender, it usually means the service executab...
Software troubleshooting desk

If you see error 404 when trying to start Windows Defender, it usually means the service executab...

If you notice your computer running slowly and Task Manager shows the OneDrive process (often One...

You try to enable BitLocker or see a drive status showing 'invalid configuration.' This usually m...

You try to reset Remote Desktop settings—maybe after a configuration error or a failed connection...

When you open Windows Security and see a 404 error page, it usually means the app can't find its ...

After a Windows Update, you might see an SSL certificate error when using Windows Search (e.g., s...