Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're having trouble downloading apps, installing updates, or launching the Microsoft Store, ...

You see an SSL certificate error in Postman when trying to send a request to an HTTPS endpoint. T...

If the Windows Security app (Microsoft Defender) is missing, won’t open, or shows errors, reinsta...

If you're trying to download or update an app from the Microsoft Store and the progress bar stays...

You open Windows Security from Command Prompt and see nothing but a blank window. This can happen...

If Windows keeps prompting you to activate every time you start your PC, it's usually a sign that...