I bought my pc from dell with xp home edition already installed (they didnt gie me a disc) so all i have is the product key from the sticker on my tower. I got a new RAM & someone said they knew what they were doing when they changed it for me. I got my pc back (running fast) & they put on windows 7 instead of my xp, which ive now discovered is not genuine. I would have been more than happy to upgrade myself, didnt need him being all shady about it. However ive now bought a new laptop & wish to give my pc to a family member, id like to put my genuine windows back on til i or they can afford to get a genuine windows 7 upgrade. Also i could have swore i was operating on a 64-bit but hes changed it to 32-bit (my new RAM is 2G). Any help is appreciated. Thanks