3 Dell OptiPlex GX110s

Well, I went to a surplus sale and somehow I found myself driving home with 3 Dell GX110s and a 20" ViewSonic Monitor. I bought these to have something to play with a bit and since I have some friends that like StarCraft... LAN Party anyone? Anyways... I came home and picked a random one. I put XP on it with no problem, it boots up, it works. To the next one.

Random Note: (i got all of this for $5)

I put in the XP Disk. It starts installing...all looks well, then randomly, it pops up saying a file cannot be copied. "Well that's weird." After retrying it multiple times, I choose to skip the file, only to have a steady stream of more files that cannot be copied pop up. This seemed like a Drive error to me. So i take the drive from the first machine that worked and try the installation again, it still has the problem. I then grab the last machine and try it, it has the same problem.

To me this seems like a CD problem, but I don't understand why it would work once and then not again, especially with two systems that are the exact same. And no, the CD is not scratched or anything like that. I'll admit, I'm a bit dumbfounded here. I don't think it is the hard drive, but it's possible.

Anyone have any ideas or suggestions about this? Your help is greatly appreciated.

I took the hard drives out of the troublesome machines and put them into the working machine to install windows. Miraculously, it worked. They are all working now. Thanks for your help anyways lostandwandering.