Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you've disabled Cortana and find that Windows Search no longer returns results or runs slowly,...

After a recent Windows update, you might see an error like 'port already allocated' when starting...

If you see error 0x80070002 when trying to install Windows updates that are stuck on "pending ins...

You open Outlook, try to send or receive email, and get an authentication failed error. The progr...

If you're seeing 'permission denied' when searching for Windows files on your Mac, it's usually b...

If Windows Update is stuck, showing errors like 0x80070002 or 0x80073712, or simply won't install...