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

Fixing NGINX 502 Bad Gateway in Docker Containers
When running NGINX as a reverse proxy in Docker, a 502 Bad Gateway error usually means NGINX cann...

How to Fix Git Detached HEAD State and Undo Changes
You run git status and see something like "HEAD detached at abc123". This ha...

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 Error 0x80070080 When Windows Update Stuck
You see error 0x80070080 and Windows Update hangs at a certain percentage. This usually means a p...

Fix VS Code Git Authentication Failed Keychain Error
If you see "Git authentication failed" in VS Code on macOS, the problem is often the macO...


    Issue queue
Sitemap
How to Clean Up Docker No Space Left on Device
How to Fix ERR_NAME_NOT_RESOLVED in Chrome
Malware Causing Firefox Secure Connection Errors
Chrome Sync Disabled on School Chromebook: What to Do
Resolving Node Version Requirement Errors
How to Fix Windows 11 Update Hanging in Safe Mode
How to Fix Permission Denied in VS Code Terminal
Troubleshooting Windows Samba Share Access Denied
Windows Shared Folder Not Accessible Troubleshooting
How to Reset Proxy Settings in Windows 11
Git Merge Conflict Resolution Tool Setup Guide
Fix ERR_CONNECTION_RESET in Chrome Due to Antivirus
Desk note

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