I downloaded the windows 10 installation media from this exact web address and have followed the steps up until the product key: https://www.microsoft.com/sv-se/software-download/windows10ISO (that site may be in Swedish because I'm from Sweden)
So I just changed boot option to my m.2 ssd and wanted to install windows on it (I unplugged my hd while installing windows though a usb with windows 10 installation media). The question I have is what product key I have to buy to get it working? Homer or Pro or does it even matter? Please help!