Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

How to Fix Nginx Upstream Connection Refused on Port 80

When nginx logs show "upstream connection refused" while connecting to port 80, it means ...

Fix Windows Security App Missing from Start Menu

You open the Start menu, type “Windows Security,” but nothing appears. The app may have been unre...

Fix Docker Volume Permission Denied in Containers

You start a container with a bind mount volume, and the application inside can't write to it....

Fix Git 'index.lock' File Exists Error in IntelliJ

If you see an error like fatal: Unable to create 'project/.git/index.lock': File ex...

Fix Nginx 502 Bad Gateway with Docker Multiple Containers
If you run Nginx as a reverse proxy in front of multiple Docker containers, a 502 Bad Gateway err...

Fix Windows Defender Blocked by Third-Party Antivirus
You open Windows Security and see a yellow warning: "Real-time protection is off. Your device...


    Issue queue
Sitemap
Fix Nginx Config Test 'Permission Denied' Error
Reset Git Credentials for VSCode Error
Node Version Mismatch: Troubleshooting Package Installation
Windows Defender Real-Time Protection Disabled by Antivirus
Python Memory Error Fix: Chunking Large Files Correctly
Fix Missing Environment Variables in Docker Build
How to Use IPConfig Release and Renew on Windows 11
Fix Windows Update Error 0x80070002
How to Fix Python Memory Error When Reading Large Files
How to Fix Nginx Location Directive Syntax Errors
Fix Nginx Permission Denied on Configuration File
Remove Problematic Windows 11 Update via Safe Mode
Desk note

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