Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

Windows Defender (now Microsoft Defender Antivirus) can sometimes show configuration errors—setti...

You try to open Outlook and get the message: "The Outlook data file cannot be opened." This usual...

If you disabled extensions in Chrome and now the browser gets stuck on a loading screen (white pa...

If you get an authentication failed error when sending email in Outlook, the problem is usually a...

If you see a message that the Windows Search service keeps stopping, or your file searches sudden...

You're working in a Jupyter notebook, and suddenly the kernel dies. The notebook becomes unrespon...