How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Windows Security App Not Opening Command Prompt
You click the Windows Security icon or try to launch it from Settings, but nothing happens. Or pe...
Fix Chrome Hardware Acceleration Black Screen on External Monitor
If you connect an external monitor to your laptop and Chrome shows a black screen on that display...
Update Git SSL Certificates to Fix 'unable to get local issuer'
If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...
Fix Git SSL Certificate Problem: Unable to Get Local Issuer
You run git clone https://example.com/repo.git and get:
fatal: unable to acc...
Windows Update Service Troubleshooting Checklist
When Windows Update stops working, the update service itself is often the culprit. You may see er...
Issue queue
SitemapChrome Extensions Not Syncing? Here's How to Fix It
Resolve err_name_not_resolved from Chrome Extensions
Resolve 0x800f081f Update Failure
Node.js Production OOM: Causes and Solutions
How to Resolve Git Clone Timeout in Linux
How to Fix 'Running Scripts Disabled' in VS Code PowerShell
How to Fix Error 0x80070005 When Updating Windows
Fix Git Clone Connection Timed Out After 30 Seconds
Show System Tray Icons in Windows 10
How to Fix Nginx 502 Bad Gateway in Docker Alpine
How to Trust Self-Signed Certificates on Localhost
Python Conda Install Permission Issue Fix
Resolve err_name_not_resolved from Chrome Extensions
Resolve 0x800f081f Update Failure
Node.js Production OOM: Causes and Solutions
How to Resolve Git Clone Timeout in Linux
How to Fix 'Running Scripts Disabled' in VS Code PowerShell
How to Fix Error 0x80070005 When Updating Windows
Fix Git Clone Connection Timed Out After 30 Seconds
Show System Tray Icons in Windows 10
How to Fix Nginx 502 Bad Gateway in Docker Alpine
How to Trust Self-Signed Certificates on Localhost
Python Conda Install Permission Issue Fix