Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fix Docker Nginx 502 Bad Gateway Upstream Error

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

Chrome Startup Crash When Opened from Task Manager

You click 'Run new task' in Task Manager, type 'chrome', hit Enter, and Chrome cr...

Git Merge Conflict: Keep Both Files Instead of One

When you run git merge and get a conflict, Git stops and marks the conflicting files...

Fix Windows Defender Real-Time Protection Not Starting

If you see a yellow warning or a message that real-time protection is off, Windows Defender’s cor...

Fix DNS Probe Finished NXDOMAIN Error on Mac

You're browsing on your Mac and suddenly a site won't load, showing the error DNS...

How to Fix Git Push Rejected Non-Fast-Forward Error
You run git push and get ! [rejected] with non-fast-forward

Issue queue Sitemap Troubleshooting Firefox Secure Connection Failed SSL Fix Node Version Incompatibility When Installing Packages Bitbucket Git Remote Origin Conflict Solution How to Resolve 'git remote add origin already exists' How to Configure Wildcard Subdomains in Cloudflare Chrome Crashing Repeatedly? Try These Steps Python Permission Denied Windows Package Install Fix Fix Edge Sync Not Working Due to Third-Party Antivirus Chrome Sync Not Working After Disabling Extensions: Fixes Git Detached HEAD: How to Save Your Work with a Branch Fix Docker Overlay2 Disk Usage and No Space Left Errors Troubleshooting Python Package Conflicts in venv Desk note Troubleshooting paths Home Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities