Hey, my mom bought an HP computer about a year ago and I put some games and stuff on it and it's running kind of slow. I'm building a new computer for myself in the next week or two, so I can take everything off (my mom doesn't have anything important on it). I told her I could reformat the harddrive, and that's what she wants. But since we bought it from HP, we didn't get an XP cd. I have another one at our other house that I can use, but I need to find the registry key that the HP is using because I already used the reg. key on the cd I'll be using. Is there a way in windows to find out what the registry key you're using is? Or do I need to call HP or something? Thanks.