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 Chrome Startup Error 'Permission Denied' on Windows and Mac
When you try to open Google Chrome and see an error message like "Permission denied" or a prompt ...
Fix OneDrive Permission Denied Sync Errors
You see a red circle with a white cross on your OneDrive icon, and hovering over it shows "Permis...
How to Run Windows Security on a Mac
If you need to run Windows Security (formerly Windows Defender) on a Mac, you're likely trying to...
Windows Terminal Proxy Settings Not Saving: Practical Fixes
You set a proxy in Windows Terminal's settings.json file, but after closing and reopening the app...
How to Force Install Windows Update Using Command Prompt
If Windows Update is stuck, failing, or refusing to find updates, you can force an install using ...
Topic paths
Quick titles
How to Reactivate Windows 10 After Replacing Motherboard or CPUHow to Fix Remote Desktop DNS ErrorsWindows Defender Real-Time Protection Disabled FixRemote Desktop Ubuntu: Secure Configuration ChecklistFix Windows Defender Real-Time Protection Permission DeniedFix PowerShell Profile Causing Blank Screen at StartupHow to Set Up Task Scheduler with a Proxy ServerFix Windows Terminal 404 Not Found Error Code