Fix Windows Security Service Not Running for Antivirus
If Windows Security shows 'Service not running' or your antivirus isn't working, the underlying s...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Security Migration Slow Performance
When migrating Windows Security settings—whether during an OS upgrade, a system rebuild, or a dom...
Fix Windows Search 404 Not Found After Update
After a Windows update, you might click the search bar or a search result and get a blank page or...
Fix Windows Defender Token Expired in Safe Mode
If you see a 'token expired' message when trying to run Windows Defender in Safe Mode, it usually...
Fix OneDrive Sync Port Already Allocated Setup Error
When setting up OneDrive sync, you might see an error saying the sync port is already allocated. ...
Fix Windows Security Proxy Error Not Working
Windows Security may stop working with a proxy error, often due to misconfigured proxy settings o...
Topic paths
Quick titles
How to Reinstall Windows Security in Windows 10Quick Fix for Remote Desktop Authentication ErrorsTroubleshooting Kubernetes Pod CrashLoopBackOff Permission ErrorsHow to Resolve Security Token Expired in WindowsWindows Activation Failed: How to ReactivateWindows Defender Sync Problems: Quick Fix GuideResolve Chrome Profile File Locked ProblemTroubleshooting Missing launch.json in VSCode Debug