How to Fix Windows Defender Service Not Running
If you see a message that Windows Defender is not running or the security center shows it's off, ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix SSL Certificate Errors in Windows Search
When Windows Search throws an SSL certificate error—often as 'The certificate is not valid' or 'A...
Fix Chrome Token Expired Error on Startup
You open Chrome and see a message like "Token expired" or "Authentication token expired" before t...
How to Temporarily Turn Off Windows Security for Troubleshooting
If you're troubleshooting a stubborn app or driver issue, Windows Security (formerly Defender) mi...
Fix Windows Search Connection Refused Error
When you click the Start menu or search bar and see 'connection refused', Windows Search is faili...
Fix Docker Build Unauthorized Authentication Required Error
When you run docker build and see an error like failed to solve: unauthorized:...
Topic paths
Quick titles
How to Fix Windows Update Stuck on ConfiguringFix Chrome Opening on Startup with RegistryTroubleshoot Windows Security Turned Off ErrorResolve Chrome Network Error: Corrupted ProfileTroubleshoot Windows Update Error 0x800f0922How to Fix Outlook Rate Limit Error 0x80070005Resolve Nginx 502 Bad Gateway PHP-FPM ErrorsHow to Resolve OneDrive Error 0x8007016a