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 OneDrive DNS Error 0x8004de4a
You see error 0x8004de4a when trying to sign in or sync files in OneDrive. This usually means a n...
Fix Command Prompt Not Recognizing Commands
You type a command in Command Prompt and get '...' is not recognized as an internal or exte...
Fix Windows Activation File Locked After Upgrade
After a Windows upgrade, some users encounter an activation error stating that a required file is...
Fix Chrome Dependency Conflict Error 0x8007007e
When launching Google Chrome, you might see an error message like "The application was unable to ...
Jupyter Kernel Not Starting Python Environment: Fixes
You launch a Jupyter notebook, select your Python environment kernel, and the notebook stays stuc...
Topic paths
Quick titles
PowerShell 429 Error: How to Fix Rate LimitingTask Scheduler Remote Connection Refused TroubleshootingHow to Reset OneDrive Sync Cache Without Deleting FilesFix Task Scheduler Task Stuck in Running StatusHow to Fix Screen Sharing in Microsoft TeamsChrome Offline Installer Sync TroubleshootingHow to Fix Cache Action Permission Denied on GitHubHow to Fix 'convert Command Not Found' on Mac