I downloaded the iso during the free upgrade period but didn't get around to installing it until last weekend. On my first attempt I agreed to a prompt to down

I downloaded the iso during the free upgrade period but didn't get around to installing it until last weekend. On my first attempt I agreed to a prompt to download updates to the installer; it then told me I needed to have a key to continue. So I started again without downloading the updates, and I could install and activate without a key.