Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Update Service Not Running for System Restore
You might see “System Restore did not complete successfully” or “Windows Update service is not ru...
How to Fix Chrome Extensions Not Loading or Grayed Out
You open Chrome, click the puzzle icon, and see your extensions grayed out or missing. They don&#...
Fix Windows Search Indexing High CPU Usage
If your computer's fan spins up and Task Manager shows Windows Search using a lot of CPU, the...
Fix Windows 11 Installation Assistant Stuck at 99%
You're upgrading to Windows 11 using the Installation Assistant, and it gets stuck at 99% for...
Fix npm run build Syntax Error: Common Causes and Solutions
When you run npm run build and see a syntax error, the build process stops immediate...
Topic paths
Quick titles
Cannot Access Network Share in Windows 10/11Fixing Chrome Startup Crashes: A Practical Repair GuideHow to Allow Unrelated Histories in Git MergeHow to Set Up Windows Update Service CorrectlyFixing Edge Sync Error 0x80072efd on Windowspip Externally Managed Environment Fix GuideFirefox Secure Connection Failed: Practical FixesFix Windows Update Error 0x800f081f with Clean Boot