Make sure all peripheral hardware (especially USB!) is removed before fresh XP install - This includes printers, external modems etc. Add them back one at a time after you get XP up and running to find the culprit. Use MemTest86 http://www.memtest86.com/ to test your RAM. This error can also be indicative of a failing HDD (easy to replace). Good luck!
amalux
October 2006