Ahh, after three hours of troubleshooting I hang my head in defeat and cry to you fine computer citizens. Well, I built a computer for a neighbor, installed a pirated version of windows XP, and everything was great. He went to install the SP1 and realized that microsoft wouldn't allow him to update with a pirated version. After that, all hell broke loose. His computer would only boot up one in every six times, the other 5 times it would just freeze up on the "welcome" screen or the black screen immediately before it. So I told him to go buy a legitamate copy of windows XP home. I came over, reinstalled Windows with the legitimate key, reinstalled all his software, and updated the BIOS (I thought this was the problem initially). Everything seemed to be working fine. Then we turned the computer off, confident that it had been repaired and bam, it hangs again. It wont get past the "welcome" screen. No HD activity, just frozen. I ran MEMTEST86 and the RAM seems Ok, I also ran a superficial test on the harddrive (not a complete sector scan) and everything was clean.
What could possibly be wrong? Suggestions... PLEASE!
Thanks in Advance.