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...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Fix Command Prompt Failed to Start on Windows 10
If you click on Command Prompt and nothing happens, or you see an error like “Windows cannot find...
Fix Maven Dependency Resolution Issues Behind a Proxy
When Maven cannot resolve dependencies, a common hidden cause is incorrect proxy configuration. Y...
How to Fix Outlook Offline Installer Not Working
If the Outlook offline installer fails to run or gets stuck, it's often due to a corrupted downlo...
Fix Windows Search for Mac Sync Issues with OneDrive
If you use OneDrive on a Mac and rely on Windows Search (via Boot Camp or a VM), you may notice t...
How to Fix 'File Locked by Chrome' Error
You try to move, rename, or delete a file, but Windows tells you it's locked by Chrome. This usua...
Issue queue
SitemapHow to Restore Windows Search After a Recent Update
How to Resolve Task Scheduler Firewall Blocking
OneDrive Sync Module Missing Fix
Fix BitLocker Configuration Not Updating Error
Using Windows Security Tools from Ubuntu Linux
How to Fix PowerShell Ubuntu Installation Error Code
Fix Windows Activation Blank Screen: Checklist
Windows Task Scheduler Network Troubleshooting
How to Enable Windows Security Backup Automatic Restore
OneDrive Sync Path Permission Denied Fix
Fixing GitHub Actions Permissions: Step-by-Step
Outlook Hangs on Loading Profile: Step-by-Step Guide
How to Resolve Task Scheduler Firewall Blocking
OneDrive Sync Module Missing Fix
Fix BitLocker Configuration Not Updating Error
Using Windows Security Tools from Ubuntu Linux
How to Fix PowerShell Ubuntu Installation Error Code
Fix Windows Activation Blank Screen: Checklist
Windows Task Scheduler Network Troubleshooting
How to Enable Windows Security Backup Automatic Restore
OneDrive Sync Path Permission Denied Fix
Fixing GitHub Actions Permissions: Step-by-Step
Outlook Hangs on Loading Profile: Step-by-Step Guide