I've just loaded Win-XP Pro on my system that previously had Win-2000. The original HD crashed, so I bought a new one, and loaded it with XP Pro that I bought from Tigerdirect. It is a legal copy, and has been activated through Microsoft.

For the most part, everything works fine, but it will intermittantly re-boot, usually about every 4 hours or so. And naturally, whenever I'm downloading something or trying to burn a CD/DVD. I am guessing it must be something heating up, but I don't notice anything in the computer getting overly hot. The case has plenty of ventilation, and good airflow.

Anyone have any ideas?

Thank You!

See if anything here helps:

http://www.d-a-l.com/help/showthread.php?t=50190