Hi i'm looking at either windows 8 or windows 7 64bit oem operating systems and my question is if I have an oem drive I can reinstall it as many times as i want on my 1 drive i chose which is a 120gb ssd but i cant take it off one drive and put it on another, so for example i install it on my pc then i upgrade my motherboard cpu and ram, I cxan just renistall it on the same drive? could i also just put the drive in a completely different computer and reinstall it there as long as its still on my ssd? thanks in advance.