I just finished building a new computer. i installed windows xp professional, and it works fine. i have an old hard drive from a computer that had windows 95 on it. i tried adding this hard drive to the computer but i get an invalid system disk error whenever i try to boot. if i remove the hard drive that has xp on it, 95 starts to boot from the old hard drive but then i get an error. is there anyway i can get the old hard drive to work on the new computer?