Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're running Windows on a Mac via Boot Camp, Parallels Desktop, or VMware Fusion, you may fi...

If you see a notification that Windows Defender real-time protection is off, or it keeps turning ...

If you see the error 'Windows activation failed to start Windows 10' when trying to activate, it ...

If you see error 0x800ccc0e in Outlook, it usually means the client cannot reach the mail server....

When you open Windows Security and see a “502 Bad Gateway” error, it means the app can’t connect ...

If you see a '404 Not Found' error when opening Windows Security (formerly Windows Defender), the...