Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you try to access a shared folder or printer on another computer, you might see an error:

You might see errors like 'The information store could not be opened' or 'Your Microsoft Exchange...

You open Outlook in Microsoft 365 and see a '404 Not Found' page. This usually means Outlook can'...

If you're seeing a '502 Bad Gateway' error when trying to activate Windows, the problem is usuall...

If you see a 502 Bad Gateway error in Chrome, it usually means the server you're trying to reach ...

When the Microsoft Store won't open, shows error codes, or fails to download apps, it's usually d...