I have a Compaq Presario 5000Z desktop. I bought a new hard drive to practice installations with, like Windows 2000 Pro, Windows XP Pro, etc. The problem is Compaq will not allow the O/S's to be installed (like XP), or they do so with all kinds of errors an conflicts (2000 Pro). Since it came with Me on the original hard drive, it only wants Me to be installed. I bought the new drive to practice installations from scratch, but I'm guessing proprietary problems forbid this. I'm doing this to practice for my A+ certification, but I'm having no success. Did anyone ever have this problem before? Can anyone help me out, or point me in the right direction? Compaq also has a problem with drivers, none of them seem to work. The Compaq site will not even allow me to even download them, because I'm trying to install an O/S other than originally came with the computer?