Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You installed a Windows 11 update, rebooted, and hit a blue screen. This often happens when a dri...

When installing Python packages with pip, you might see an error ending with exit code 1

How to Create a New Branch from a Detached HEAD in Git
If you see a message like "You are in 'detached HEAD' state" in Git, it means you...

Chrome Certificate Error Invalid Authority: Diagnosis Checklist
When Chrome shows NET::ERR_CERT_AUTHORITY_INVALID and refuses to load a site, it...

Fix Node Sass Build Failure on Windows 10
If you see errors like Module build failed: Error: Node Sass does not yet support your curr...

Fix VSCode Git Authentication Failed: Permission Denied
If you see 'Git authentication failed' or 'permission denied' when pushing or pul...