When I first built this computer, I bought a copy of windows 8. I upgraded to windows 10 when it came out, and now, I'm about to upgrade my computer including my motherboard. I want to keep my drive and all my data, as well as windows 10. I have a windows 8 key. If I change my motherboard and boot up, what will happen? Can I keep this windows 10 installation? I saw a solution was to downgrade to windows 8, then reupgrade to 10, but I can't do that anymore now that the promotion is over, I think.