Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You see error 0x800704cf when trying to activate Windows, with the message "Cannot connect to the...

After installing updates and restarting, Windows may crash, freeze, or loop on the login screen. ...

You open Windows Security and see a red banner: “Virus & threat protection turned off.” This can ...

You might need to stop Windows Search if it's holding port 10243 or another port you need for dev...

When migrating Windows Security settings—whether during an OS upgrade, a system rebuild, or a dom...

If you're stuck in a OneDrive sync login loop—where you sign in, it seems to work, but then immed...