Fix Nginx Upstream Connection Refused Socket Error
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesCloudflare SSL Full Strict Setup Guide
If you enable Cloudflare's SSL/TLS encryption and set it to Full (Strict), y...
Fix Windows Explorer Restarting After Software Install
If you've just installed a program and Windows Explorer starts restarting repeatedly—taskbar ...
Windows 11 WiFi Has Internet but Other Devices Work Fine
You're connected to WiFi on your Windows 11 PC, but the network icon shows 'No internet&#...
Windows 11 Update Stuck at 0% Due to Corrupt Files: Fixes
You start a Windows 11 update, and it hangs at 0% for minutes or hours. Corrupt system files are ...
How to Fix Error 0x80070005 When Updating Windows
When you see error 0x80070005 during a Windows Update, it usually means the update process lacks ...
Issue queue
SitemapHow to Increase Node.js Memory Limit on Linux Server
Chrome Black Screen Fix for Hardware Acceleration and Zoom
How to Resolve Git Merge Conflicts with Deleted Files
Stop Nginx Redirect Loop in Server Block
How to Resolve DNS_PROBE_FINISHED_NXDOMAIN for One Site
Git Stash Fails: index.lock Exists – Fix
Windows Update 0x80070002 After Update: Fixes
Windows Explorer Keeps Restarting: Cache Fix
Resolve npm Permission Denied on Windows 10
Fix VS Code Permission Denied When Not Admin
Cloudflare DNS Slow Propagation Fix
Windows 11 Installation Assistant Stuck at 99% Due to Antivirus
Chrome Black Screen Fix for Hardware Acceleration and Zoom
How to Resolve Git Merge Conflicts with Deleted Files
Stop Nginx Redirect Loop in Server Block
How to Resolve DNS_PROBE_FINISHED_NXDOMAIN for One Site
Git Stash Fails: index.lock Exists – Fix
Windows Update 0x80070002 After Update: Fixes
Windows Explorer Keeps Restarting: Cache Fix
Resolve npm Permission Denied on Windows 10
Fix VS Code Permission Denied When Not Admin
Cloudflare DNS Slow Propagation Fix
Windows 11 Installation Assistant Stuck at 99% Due to Antivirus