Fix Nginx Config Test Fails with 'upstream host not found'
You run nginx -t and get upstream host not found. The config test fails...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesMicrosoft Store Not Opening: Step-by-Step Troubleshooting Checklist
When you click the Microsoft Store icon and nothing happens—no window, no error, just silence—it'...
Windows Security Configuration Checklist
If you're setting up a new Windows machine or reviewing an existing one, a security checklist hel...
Windows Terminal Version Mismatch: A Practical Checklist
You open Windows Terminal and get a version mismatch error—or something just doesn't work the sam...
Fix Outlook Auto Start Not Working in Windows 7
If you rely on Outlook opening as soon as you log into Windows 7, having it fail to auto-start ca...
Fix Windows Security Module Not Found in Windows 11
You open Windows Security and see 'Windows Security module not found' or the app fails to launch....
Issue queue
SitemapChrome Profile 404 Sync Error Fix
BitLocker Password Change Error: Recovery Key Method
Windows Security 502 Bad Gateway: Troubleshooting Checklist
BitLocker Command Missing After Update – How to Restore
Why Command Prompt Stuck on Opening? Fixes to Try
How to Fix Remote Desktop Module Not Found on Windows Server
Fix Ubuntu apt Lock Stuck Waiting for It to Disappear
Free BitLocker Reader for Mac
Microsoft Teams Blank Screen: Step-by-Step Reinstall Fix
BitLocker Configuration Guide for Windows 11
BitLocker Token Expired: Domain-Joined Fix
Microsoft Store Won't Start on Windows 11 – Troubleshooting Guide
BitLocker Password Change Error: Recovery Key Method
Windows Security 502 Bad Gateway: Troubleshooting Checklist
BitLocker Command Missing After Update – How to Restore
Why Command Prompt Stuck on Opening? Fixes to Try
How to Fix Remote Desktop Module Not Found on Windows Server
Fix Ubuntu apt Lock Stuck Waiting for It to Disappear
Free BitLocker Reader for Mac
Microsoft Teams Blank Screen: Step-by-Step Reinstall Fix
BitLocker Configuration Guide for Windows 11
BitLocker Token Expired: Domain-Joined Fix
Microsoft Store Won't Start on Windows 11 – Troubleshooting Guide