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 notesChrome Won't Start After Antivirus Install: Quick Fixes
You installed a new antivirus program, and now Chrome refuses to launch. Clicking the icon does n...
Fix Windows Defender Update Error 0x80070490 on Windows 11
If you see error 0x80070490 when trying to update Windows Defender on Windows 11, it usually mean...
Windows Activation Backup: Saved Keys Not Showing?
You backed up your Windows activation using the built-in backup tool or a third-party utility. La...
Windows Update Cannot Connect (Permission Denied) Fix
If Windows Update fails with a “cannot connect” or “permission denied” error, it usually means th...
Fix Windows Search After Disabling Cortana
If you've disabled Cortana and find that Windows Search no longer returns results or runs slowly,...
Issue queue
SitemapBitLocker Rate Limit Error Registry Fix Guide
How to Configure OneDrive Sync Behind a Proxy
Configuring DNS for VPN in Windows Terminal
Troubleshooting BitLocker DNS Error When Unlocking Drive
Reactivate Expired Windows License: Step-by-Step
Microsoft Teams Port Already Allocated: How to Fix
Silent Install Microsoft Teams Offline with Parameters
Windows 11 Svchost.exe High CPU Fix
Windows Terminal Permission Denied: Quick Fixes
Error 0x80070020: File Locked by Windows Security Fix
Fix Microsoft Store Sign-In Loop: Step-by-Step Guide
Step-by-Step Guide: Fix DNS Error in Windows Security
How to Configure OneDrive Sync Behind a Proxy
Configuring DNS for VPN in Windows Terminal
Troubleshooting BitLocker DNS Error When Unlocking Drive
Reactivate Expired Windows License: Step-by-Step
Microsoft Teams Port Already Allocated: How to Fix
Silent Install Microsoft Teams Offline with Parameters
Windows 11 Svchost.exe High CPU Fix
Windows Terminal Permission Denied: Quick Fixes
Error 0x80070020: File Locked by Windows Security Fix
Fix Microsoft Store Sign-In Loop: Step-by-Step Guide
Step-by-Step Guide: Fix DNS Error in Windows Security