
Reset Windows Defender Service to Default Settings
If Windows Defender isn't starting, showing errors, or acting strangely, the service settings may...
Software troubleshooting desk

If Windows Defender isn't starting, showing errors, or acting strangely, the service settings may...

If Windows Defender keeps crashing and restarting on your Windows 10 PC—showing error messages, d...

After a browser crash, you might see errors like '...

After a Windows update, you might see an error like “Search is not working” or “Invalid configura...

When Windows is not activated, you may see a watermark on the desktop, lose access to personaliza...

You enter your password, Outlook seems to accept it, then immediately prompts for credentials aga...