Checklists for software errors, setup, and tool workflows.

Nginx 502 Bad Gateway: Troubleshooting Checklist

If you're seeing a 502 Bad Gateway from nginx, it usually means nginx can't reach the upstream se...

How to Fix Windows Update Error 0x80073712 with a Clean Boot

Windows Update error 0x80073712 usually appears when a system file required for the update is mis...

Fix Windows Defender DNS Error After Update

After a Windows Update, you might see a Windows Defender error related to DNS—often something lik...

Fix Docker Build Error: 'failed to solve: manifest not found'

You run docker build and get an error like:

failed to solve: error fetching ...

Fix Docker Compose .env File Not Found on Mac

You run docker compose up on your Mac and get an error like WARNING: The VAR v...