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 VS Code 'Permission Denied' When Saving Files

You're editing a file in Visual Studio Code, hit Ctrl+S, and get an error: "Failed to sav...

Fix DNS Probe Finished NXDOMAIN on Custom DNS Server

If you see “DNS PROBE FINISHED NXDOMAIN” in Chrome or another browser while using a custom DNS se...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer

When you run git clone or git pull and see an error like "S...

Resolving Python Dependency Conflicts Between Requirements Files
When your Python project uses multiple requirements files—for example, requirements/base.tx...

Practical Chrome Memory Management Tips If you often see Chrome consuming several gigabytes of RAM, you're not alone. High memory usa...

Issue queue Sitemap Python File Encoding Error: How to Fix UnicodeDecodeError How to Fix Cloudflare 521 Error Due to Proxy Issues Windows Defender Real-Time Protection Greyed Out: How to Fix Windows Search Indexing Not Working for Outlook Fix How to Fix Windows Update Service Not Running After Update Fix Docker Pull Access Denied for Private Repository Windows Defender Real-Time Protection Stuck Off Windows Update Service Permission Denied Fix Python MemoryError Large File Solutions Fix Chrome High Memory Usage on Windows and Mac Understanding Git's Detached HEAD State Cloudflare Full Strict SSL Sync Troubleshooting Desk note Troubleshooting paths Home Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities