Fix Windows Update 502 Bad Gateway Due to Firewall Settings
When Windows Update fails with a 502 Bad Gateway error, it often points to a network issue—common...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Nginx 404 on All Pages Except Index
If your Nginx server loads the index page but returns 404 on all other pages, the issue is almost...
Fix OneDrive Sync Error 0x8004de40 (SSL Certificate)
If you see error 0x8004de40 when syncing OneDrive, it usually means your computer cannot verify t...
Fix npm Command Not Found Error Code 1
When you run an npm command and get 'npm' is not recognized or command not fou...
Windows Defender Offline Scan Setup Guide
If your Windows PC is infected with malware that won't go away with a normal scan, a Windows Defe...
Fix OneDrive Sync Blocked by Network Firewall
If OneDrive stops syncing and you see errors like "Sync is blocked" or files stay stuck with a sp...
Topic paths
Quick titles
How to Fix Windows Terminal 404 Error on OpenWindows Terminal Certificate Validation TroubleshootingBitLocker Recovery Key Fails with 504 ErrorPowerShell Beginner Setup ChecklistOneDrive Troubleshooting: Connection Refused Quick GuideUnderstanding Terminal and Command Prompt on MacHow to Fix 'chrome command not found' in BashTeams Sync Not Working After Offline Install?