Windows Defender 502 Bad Gateway: Troubleshooting Checklist
If you see a 502 Bad Gateway error when opening Windows Security or trying to update Windows Defe...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Update Login Loop After Configuration Settings
You restart your computer after a Windows update, and instead of reaching the desktop, you see th...
How to Fix Microsoft Teams Version Mismatch Errors
When Microsoft Teams reports a version mismatch, you may see errors like "You're using an older v...
Fix Windows 11 Search Not Showing Open Files
If you search for a file that you know is open in an app, but Windows 11 search doesn't show it, ...
Enable Windows Defender After Disabling Third-Party Antivirus
If you've disabled or uninstalled a third-party antivirus and now find Windows Defender is not au...
Fix Firefox Secure Connection Failed on Windows 10
When Firefox shows "Secure Connection Failed" on Windows 10, it usually means the browser cannot ...
Topic paths
Quick titles
Windows Update Broke Task Scheduler: TroubleshootingTroubleshooting Chrome Remote Debugging Port ConflictsHow to Stop Firefox Freezing on Windows 10Chrome ERR_CONNECTION_RESET Network Change GuideChecklist for Microsoft Teams Service UnavailableResolve 404 Error in Outlook on the WebOneDrive Sync Network Error TroubleshootingWindows Security Not Starting After Update