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 Security Connection Refused Due to Antivirus Blocking
You try to open Windows Security or run a scan, and get a 'connection refused' error. Often this ...
Fix Windows Search for Mac Tool Not Responding
If you're using a Mac tool that indexes or searches Windows files (like Parallels Desktop, VMware...
Fix WSL Ubuntu Internet Not Working Due to Windows Firewall
If your WSL Ubuntu instance has lost internet connectivity, the Windows Firewall is a common culp...
How to Fix Windows Update Service Not Running
If Windows Update won't start or you see an error that the update service is not running, it's us...
How to Fix Windows Search Settings Greyed Out
You open Windows search settings and find toggles or options greyed out—unclickable. This usually...
Topic paths
Quick titles
Redis Connection Refused? Check Your FirewallFixing Postman Request Timeout and Connection Refused ErrorsWindows Update 502 Bad Gateway: Step-by-Step FixFix Windows Search Indexing Permission Denied After ReinstallFix Slow Windows Search After a Recent UpdateWindows Security Stuck Loading: Practical Fix ChecklistWindows Search Index Problems Step-by-StepResolve No Matching Distribution Found When Installing tar.gz