I learned that the problem could be caused by certain Windows files being damaged. So I tried a repair install. The Window installation disk would load several normally before saying something like "Starting Windows", hanging for a bit and then giving me a 0x7B error.
After several more attempts to diagnose and fix the problem, I gave up. Thinking it would get rid of whatever bad data or possible viruses were preventing XP and the installation disk from booting, I reformatted the hard drive. I then tried to do a fresh install but got the same 0x7B error. I fear that the problem wasn't anything on the drive but the drive itself. Does my problem sound like anything that can be fixed or should I get a new hard drive for Christmas?