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 Nginx 502 Bad Gateway Docker Permission Denied
When running Nginx as a reverse proxy in a Docker environment, a 502 Bad Gateway error often poin...
Why Windows Security App Keeps Crashing and How to Fix It
If the Windows Security app keeps crashing when you open it, you're not alone. This issue oft...
Setting Up Cloudflare Wildcard Subdomains for Multiple Sites
If you manage multiple sites or services on different subdomains (like app.example.com, blog.exam...
Fix VS Code Breakpoints Not Hit in Multi-Root Workspace
If you're using a multi-root workspace in VS Code and finding that breakpoints in some folder...
Windows Update Service Not Running: Registry Fix Guide
If Windows Update fails to run, the service may be disabled or corrupted. This guide covers regis...
Issue queue
SitemapFix Windows 11 Update Stuck at 0% with Service Not Running
Chrome Memory Cleanup: Built-in Tools Guide
How to Fix Cloudflare Error 521: Origin Server Unreachable
Troubleshooting VSCode Breakpoints in launch.json
How to Change Git Remote URL with git remote set-url origin
Windows Security App Not Opening Command Prompt Fix
Resolve npm Build Errors After Pulling Code
How to Resolve 502 Error with Docker Socket in Nginx
Troubleshoot Cloudflare Origin Certificate Mismatch
Chrome Sync Broken on Android – Step-by-Step Repair
Windows 11 Bluetooth Not Turning On: Fix Guide
How to Free Up Docker Disk Space
Chrome Memory Cleanup: Built-in Tools Guide
How to Fix Cloudflare Error 521: Origin Server Unreachable
Troubleshooting VSCode Breakpoints in launch.json
How to Change Git Remote URL with git remote set-url origin
Windows Security App Not Opening Command Prompt Fix
Resolve npm Build Errors After Pulling Code
How to Resolve 502 Error with Docker Socket in Nginx
Troubleshoot Cloudflare Origin Certificate Mismatch
Chrome Sync Broken on Android – Step-by-Step Repair
Windows 11 Bluetooth Not Turning On: Fix Guide
How to Free Up Docker Disk Space