Hi! i have buyed an HP pavillion windows 7 for not so long ago and now windows wants me to activate it. but the problem is that they say that i should enter a code thats on the side of the computer. So i enter the code but then i see that this code is for windows vista home premium. The last owner must have installed windows 7 after he has bought it. I have two choises 1. I have to buy a new code 2. i ask you guys. so i take number 2 (not pooping) and ask: What do i DO???