I want to upgrade to windows 10 since i have a lot of games on xbox and my friends play fortnite on xbox so I want to use the xbox app to talk, but would I be able to still use my windows 7 ultimate key to activate windows 10 pro? I've seen things saying you can still do it but I want to see if anyone else has done it recently. Also, (stupid question, haven't installed an OS in a while) if i plugged in a windows 10 installer usb and started installing it would it upgrade my OS or would it be a fresh install, I don't really feel like moving everything to my mass storage drive and then copying it all back/re installing everything