Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fix Nginx Upstream Connection Refused in Proxy Pass

When Nginx returns a 502 Bad Gateway or logs upstream connection refused

Fix VS Code 'Cannot Save File: Permission Denied' on Mac
You're editing a file in VS Code on your Mac, hit save, and get: 'Failed to save:...

Fix Chrome Certificate Error: Invalid Authority SSL Certificate
If Chrome shows 'Your connection is not private' with 'NET::ERR_CERT_AUTHORITY_INVALI...

Git Merge --allow-unrelated-histories: When and How to Use It
You run git merge and get an error: fatal: refusing to merge unrelated histories...

ERR_NAME_NOT_RESOLVED on Chrome for Mac: How to Fix
If you see ERR_NAME_NOT_RESOLVED in Chrome on your Mac, the browser can't transl...

How to Fix Windows Update Error 0x80070002 by Resetting Components
If you see error 0x80070002 when trying to run Windows Update, the system often cannot find or re...


    Issue queue
Sitemap
Windows Update Service Not Running: Registry Fix Guide
How to Resolve BSOD After Windows 11 Update
Fix Cloudflare SSL Certificate Mismatch on Origin
Fix Windows Update Error 0x80070002
How to Fix Windows Update Error 0x80070005 Permission Denied
How to Add Python to PATH in Windows 10 64-bit
Resolving Large File Error in Git Push
Fix Stubborn Git index.lock File Not Deleting
Windows 11 Update Stuck at 0%: Practical Checklist
Fix Windows 11 Upgrade Stalling at 99%
Resolve Node.js Heap Memory Error in Docker
How to Fix Node.js Permission Errors in VS Code
Desk note

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