Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run source venv/bin/activate (or venv\Scripts\activate on Windows) ...

If your Windows 11 update is stuck at 0% and not progressing, the SoftwareDistribution

Fix Error 0x80070080 When Windows Update Stuck
You see error 0x80070080 and Windows Update hangs at a certain percentage. This usually means a p...

Fix Docker Pull Access Denied for Private Repository
When you run docker pull for a private repository and get an access denied

Docker Compose Port Already Allocated: Checklist
You run docker-compose up and get an error like Error starting userland proxy:...

Fixing Nginx Upstream Connection Refused on Port 443
You see "upstream connection refused" in your Nginx error log when proxying requests to p...