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 Microsoft Teams Slow Performance on Windows 10
If Microsoft Teams feels sluggish on your Windows 10 PC — messages lag, calls stutter, or the app...
Fix 'Path Not Found' Error in Command Prompt
When you run a command in Command Prompt and see 'The system cannot find the path specified', it ...
Fix Remote Desktop 404 Not Found After Windows Update
After a recent Windows update, you might see a '404 Not Found' error when trying to connect to a ...
How to Fix Windows Activation File Locked Error
You might see a Windows activation error saying the license file is locked or can't be written. T...
PowerShell High Memory Usage Not Dropping: Fixes That Work
You run a PowerShell script, memory usage climbs to several hundred MB or even GB, and after the ...
Topic paths
Quick titles
Fix Windows Update Component Not Found ErrorHow to Fix a Chrome Extension That Is Not RespondingWindows Defender Disabled by Group Policy FixHow to Resolve Port Conflicts in Task SchedulerFix Windows Update Assistant on Mac – Boot Camp & VMHow to Fix a Task Scheduler App That Won't Launch on MacFix Microsoft Teams Microphone Not Working in MeetingsFix Command Prompt Error 0xc0000142 on Windows 10