Hi! So this is the deal, i'm going to upgrade my lenovo y510p drive, it has a 1tb 5400 rpm and a 8gb ssd, i want to remove the 1tb drive and the 8gb ssd, and install a samsuing evo 500gb ssd, so anyway can i re-use my windows 8 disc but use a different key? Or do i have to buy a whole other disc with a key? Cause i know you can buy the keys online. Thanks Max