Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're running a PowerShell command against Active Directory and get an authentication failure. T...

When Windows Security (formerly Windows Defender Security Center) can't update virus definitions ...

If you see error 0x80073cf9 when installing or updating apps from the Microsoft Store, it usually...

If you open PowerShell on Windows 11 and see nothing but a blank window—no prompt, no text—the sh...

Users may see a message like "There is a problem with your account. Please sign out and s...

Windows Security Invalid Configuration Checklist
You open Windows Security and see a message about an invalid configuration. This usually means a ...