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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...

Fix Windows Security Login Loop and Sync Issues

You sign in to Windows, see the security settings sync message, and then get kicked back to the l...

Windows Security App Missing in Windows 11: How to Restore It

If you open Start and type 'Windows Security' but nothing appears, or you get an error when tryin...

Fix Windows Defender Port Already Allocated Registry Error

When Windows Defender fails to start or update, you might see an error like 'port already allocat...

How to Fix Slow Windows Search Performance

When Windows Search takes minutes to find a file or returns no results, it's usually due to index...

Fix PowerShell 404 Error When Using Invoke-WebRequest