Fix 'Windows Defender Command Not Found Access Denied'
You type MpCmdRun.exe -Scan -ScanType 2 or another Defender command in Command Promp...
Software comparisons, alternatives, and tool decision notes.
Fit
Decision
Migration
Latest comparisons
Browse labWindows Security Login Loop: Step-by-Step Checklist
You sign in to Windows, but instead of reaching your desktop, the Windows Security prompt keeps p...
Fix Visual Studio Installer Stuck on Preparing Files
You start a Visual Studio installation or update, and the installer sits on "Preparing files" for...
Troubleshoot 504 Gateway Timeout in Windows Security App
When you open Windows Security (formerly Windows Defender Security Center) and see a 504 ...
Fix Windows Security App Stuck on Loading Screen in Windows 10
If you open Windows Security and it sits on a spinning circle or blank screen, you're not alone. ...
Fix Windows Defender DNS Error After Update
After a Windows Update, you might see a Windows Defender error related to DNS—often something lik...