Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fix 'Python Command Not Found' After Windows Installation

You installed Python on Windows, but when you type python in Command Prompt, you get...

Fix Chrome Certificate Error: Invalid Authority SSL Certificate

If Chrome shows 'Your connection is not private' with 'NET::ERR_CERT_AUTHORITY_INVALI...

Fix Docker Nginx 502 Bad Gateway Upstream Error

When running Nginx as a reverse proxy in Docker, a 502 Bad Gateway error with 'upstream' ...

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 VS Code Git Authentication Failed Keychain Error

If you see "Git authentication failed" in VS Code on macOS, the problem is often the macO...

Fix net::ERR_CERT_AUTHORITY_INVALID in Chrome on Android

When browsing on Chrome for Android, you might encounter the error net::ERR_CERT_AUTHORITY_...


    Issue queue
Sitemap
Fix DNS Propagation Delay with Cloudflare
How to Reset Network Settings in Windows 11 Offline
How to Force Enable Windows Defender Real-Time Protection
Test Nginx Configuration Syntax Safely
Adding a Wildcard Subdomain in Cloudflare DNS
How to Solve Nginx Config File Permission Denied
Fix Windows Security App Missing from Start Menu
Windows Defender Real-Time Protection Service Not Running Fix
Nginx Configuration for Cloudflare 522 Error
Chrome Update Broke DNS? Try These Fixes
Windows Update Stuck? How to Resolve Error 0x80070002
VS Code Terminal Broken After Update? Try These Fixes
Desk note

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