Software troubleshooting desk

Practical fixes for tool errors, setup blocks, and workflow issues.

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fixing Nginx Upstream Connection Refused in Load Balancing

When Nginx load balancing returns upstream connection refused, it means one or more ...

How to Set npm Prefix to Avoid Permission Denied Errors

If you've seen EACCES: permission denied when running npm install -g

Fix 'pip externally managed environment' Permission Denied Error
If you see error: externally-managed-environment when trying to install a Python pac...

DNS Probe Finished NXDOMAIN: Internet Connection but No Browsing Fix
You see the error 'DNS probe finished NXDOMAIN' on Chrome or other browsers, yet your int...

Fix Firefox Secure Connection Failed Due to Cache
You see a 'Secure Connection Failed' error in Firefox, often with messages like PR_CO...

Manually Download and Fix Windows Update Error 0x80070002
You see error 0x80070002 when checking for updates. It usually means Windows Update can't fin...


    Issue queue
Sitemap
Fix VS Code Breakpoints Not Hit in Multi-Root Workspace
Windows Explorer Restart Loop Safe Mode Fix
Docker Network Missing After Container Restart
How to Fix 'Python Is Not Recognized' on Windows
Fix DNS Probe Finished NXDOMAIN for a Specific Website
Windows 11 Update Not Progressing? Low Disk Space Fix
Chrome Black Screen on Intel Graphics? Fix It
Windows 11 Installation Assistant Stuck at 99%: Fixes That Work
Fix Docker Volume Permission Denied for Non-Root User
Resolve Edge Sync Errors with Cache Reset
Cloudflare 521 Error: DNS and Server Checks
How to Fix pip Externally Managed Environment Error
Desk note

    Troubleshooting paths
Home
Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities