I have my eldest brother's computer here, one I rebuilt for him. In attempting just now to install Windows 10, I came up with information I couldn't answer, i.e., his email. He doesn't have an email address yet, he's also never used a computer but wants to learn. He's 74 years old. So, I'm trying to make this as easy as I can for him. I'm installing Windows 7 on it right now but what I need to know is if I do an upgrade to Windows 10, will I still have to provide an email address?