Fixing Nginx Upstream Connection Refused on Port 443
You see "upstream connection refused" in your Nginx error log when proxying requests to p...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Fix Black Screen After Enabling Hardware Acceleration in Chrome
You enable hardware acceleration in Chrome to improve performance, and suddenly the screen goes b...
Docker Container Exits Immediately on Linux: Fixes
You start a Docker container, but it exits immediately. This is a common issue on Linux. The cont...
How to Fix Limited Connectivity on Windows 11 Wi-Fi
You connect to Wi-Fi but see "Limited connectivity" or "No internet, secured." Yo...
Fix npm ENOLOCAL Error: package.json Not Found on Windows 10
You try to run an npm command and get an error like ENOENT: no such file or directory, open...
Fix Windows 11 WiFi No Internet Due to Antivirus Blocking
If your Windows 11 PC shows full WiFi bars but no internet access, your antivirus might be blocki...
Issue queue
SitemapAntivirus Causing Chrome Access Violation: Solutions
Cloudflare 521 Error Troubleshooting: Server Logs Guide
Cloudflare DNS Not Updating? Fix Stuck Propagation
Edge Sync Not Syncing Passwords or Bookmarks: Fixes
How to Fix Windows Update Error 0x800f081f
Fix Docker Desktop Engine Stopped After Sleep Mode
Fix Chrome Extensions That Won't Load
Resolve pip Externally Managed Environment Error
Troubleshooting Cloudflare Error 521 Post-Update
How to Stop Windows Explorer from Restarting on Login
Fix Chrome Access Violation Error 0x00000000
Troubleshooting Docker Compose Environment Variable Precedence
Cloudflare 521 Error Troubleshooting: Server Logs Guide
Cloudflare DNS Not Updating? Fix Stuck Propagation
Edge Sync Not Syncing Passwords or Bookmarks: Fixes
How to Fix Windows Update Error 0x800f081f
Fix Docker Desktop Engine Stopped After Sleep Mode
Fix Chrome Extensions That Won't Load
Resolve pip Externally Managed Environment Error
Troubleshooting Cloudflare Error 521 Post-Update
How to Stop Windows Explorer from Restarting on Login
Fix Chrome Access Violation Error 0x00000000
Troubleshooting Docker Compose Environment Variable Precedence