Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You open an Office file from OneDrive and see an error that the file is locked or in use by anoth...

You click Install, the progress bar moves a little, then you see "Installation failed" with an er...

You click a download link in Chrome on your Mac, and nothing happens—or the file starts but never...

If you see a 502 Bad Gateway error in Chrome, it usually means the server you're trying to reach ...

If Windows Defender isn't behaving as expected—real-time protection won't turn on, settings are g...

You try to open Chrome and get an error like "Your profile cannot be loaded because it is from a ...