During installation, click "I don't have a product key" .
8/10 (for functionality), 6/10 (for ease of use for non-techies), 10/10 (for value if you already own the key). can i activate windows 10 with windows 7 key
Whether you can still use your Windows 7 key today depends entirely on your hardware's history and how you plan to use it. During installation, click "I don't have a product key"