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 Fix Chrome Extensions Not Loading After Update
After a Chrome update, you might find that some or all of your extensions have stopped working—th...
Fix Outlook Path Not Found in Profile
When Outlook reports 'path not found' in your profile, it usually means the program cannot locate...
Microsoft Teams 504 Error: Causes and Fixes
When Microsoft Teams shows a 504 error, it usually means the server gateway timed out while tryin...
How to Fix Command Prompt Permission Denied in Safe Mode
You boot into Safe Mode to run a repair command, but Command Prompt throws 'Access Denied' or 'Pe...
Fix Outlook Invalid Configuration After Update
After a Microsoft Office or Windows update, Outlook may show an "invalid configuration" error. Th...
Topic paths
Quick titles
Fix Missing Windows Security Icon in TaskbarGit Merge Conflict When Pulling: How to FixHow to Unpause Windows Search IndexingHow to Fix Microsoft Store Download Hanging at 0 BytesTroubleshoot Windows Activation Backup Restore Error After UpdateWindows Search Corrupt Config Repair GuideResolve BitLocker Freeze During Boot on Solid State and Hard DrivesHow to Fix ERR_CONNECTION_RESET After Network Change