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 listHow to Find Outlook Error Logs in Windows 10
When Outlook crashes, fails to send emails, or syncs slowly, the error logs often hold the key. O...
Fix Windows Terminal 404 Not Found Error Code
If you're seeing a '404 Not Found' error when launching Windows Terminal, it usually means the ap...
Fix 'Access Denied' When Running CHKDSK in Command Prompt
When you run chkdsk from Command Prompt and see "Access Denied" or "You do not have ...
Fix Windows Defender 404 Not Found in Group Policy
When you open the Group Policy Management Editor and navigate to Computer Configuration > Adminis...
Fix Windows Update Error 0x8024401c Due to Network Issues
If you see error 0x8024401c when running Windows Update, it usually means your PC can't reach Mic...
Topic paths
Quick titles
Pre-Uninstall Backup Guide for Microsoft TeamsChrome Profile Service Unavailable on Mac: Quick FixesHow to Fix Windows Defender File Locked Error 0x80070020Fix Edge Update Failed Error ChecklistFix Chrome Profile Network Error 'Permission Denied'Windows Terminal Access Denied Registry Key: How to FixResolve Task Scheduler 0x80070005 Access DeniedTroubleshooting Putty Connection Refused on Localhost