Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you try to activate Windows or reinstall it using a product key, you might see an error like...

If Windows Search indexing appears stuck on "Loading files" and never completes, search results m...

You try to sign in to Chrome and get a sync error. Your bookmarks, passwords, and settings aren't...

If you see an authentication failed error in Chrome on your Mac—often when signing into Google se...

You open Outlook, and the window appears—but it's completely blank. No error message, no spinning...

If Chrome is using an unusual amount of CPU, extensions are a common culprit. You might notice yo...