Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You might see a 'version mismatch' or 'permission denied' error when trying to update or run Wind...

If you see an error like “You’ve hit a rate limit” or “Too many requests” in Outlook, your accoun...

You may see a Windows Defender version mismatch error if the security intelligence definitions on...

You open Microsoft Store, see an update pending, click Update, and get an error. This happens oft...

If you see a 502 Bad Gateway error when opening Windows Security or trying to update Windows Defe...

You click the Windows Defender icon, but nothing happens—or you get an error saying the app didn'...