First of all, I know this question has been asked to death but I've been researching all day and still cannot find a straight answer, I'm fatigued and asked everywhere. I just want to pre order Windows 8 and be done with it I do not have an activated version of Windows 7, and I am currently running an inactivated Windows 8 RTM. I intend to purchase Windows 8 (or pre-purchase) on Friday. I have no idea whether I should buy Windows 8 (upgrade?) or Windows 8 System Builder My BIGGEST concern is whether System Buillder willl be locked to my specific motherboard (the way W7 OEM works) or whether I can transfer my license to a "new" system (if I happen to format, which I do a lot, or upgrade my motherboard) tl;dr: Is the only viable option the "System Builder" copy? Or can I buy the boxed Windows 7 Pro "upgrade" copy? Is the System Builder locked to specific hardware as OEMs are? I'm really disappointed in retailers/Microsoft for the poor description of this product. It's very confusing and not clear.