I would say try using a different program to do the wiping. I have never used it but have heard that Partition Magic 7.0 works well. I assume you are installing from a bootable cd? Try swapping your cdrom drive with a different one and also try using a different Windows disc if you can. The files could simply be corrupted on your cd (check for scratches, dirt) or the reader lens of your cdrom may have somthing wrong with it.

Good Luck