I just got this computer from my parents ( they got a new one and gave me there's) and I had to give them there hard drive . I got a new one (unformated) and put it in. It wouldn't start up (I didn't think it would. It said NTLDR is missing). I tried to reinstall windows xp home edition but I don't have any disks for it. They said they don't have them any more and no one I know has one any more (they all went to vista). I got the boot disk (the flopy boot disk) off the Microsoft website but they still ask for the op disk. Any suggestions on what to do.