Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

After a Windows update, you may see Explorer repeatedly restarting—the taskbar flickers, desktop ...

If you see the error error: externally-managed-environment when running pip in...

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

How to Recover from Detached HEAD in Git
You're working in a Git repository and suddenly see a message like 'You are in 'detac...

Fixing Git Authentication Failed in VS Code
If you see "git authentication failed" when pulling, pushing, or cloning in VS Code, the ...

Windows 11 Update Stuck at 0%: Manual Download Fix
You click 'Check for updates' in Windows 11, and it hangs at 0% for minutes or hours. Res...