Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to open Windows Security (Windows Defender) and see a network error like “Something went ...

You open Firefox and see a message that your profile is missing or can't be loaded. This usually ...

You're seeing 'Rate limit error: permission denied' in Chrome, often when using developer tools, ...

You just set up a new computer, but when you try to activate Windows, you see an error that the a...

When you run a PowerShell script that makes an HTTPS request, you might see a 502 Bad Gateway err...

If you're troubleshooting a stubborn app or driver issue, Windows Security (formerly Defender) mi...