Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're installing a package with pip, and suddenly you see a wall of red text: ERROR: C...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer
If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...

Fix Windows 11 Wi-Fi No Internet by Disabling IPv6
If your Windows 11 PC connects to Wi-Fi but shows 'No internet' while other devices work ...

Fix VS Code Terminal Not Opening PowerShell
If you click the terminal panel in VS Code and nothing happens, or it opens a blank shell instead...

Python Virtual Environment Not Activating in Git Bash: Fixes
You're in Git Bash on Windows, you run source venv/Scripts/activate, and nothing...

Fix 'git pull failed index.lock file exists' Error
When running git pull, you may see an error like:
fatal: Unable to create &#...