I suggested reloading "from scratch" which should take care of it. Use the XP migration tool to backup your data to a .cab file first, then format the disk. Good luck.
Sorry, according to all of the sources that I have read - there is no solution to the problem. You can ever swap out every single piece of hardware (including the power supply!!) but, the problem will return. There are "no" common demoninators (except of course windows!!)
There was actually a rather humorous post on one site (I forget which one) expounding on the common demoninator theory and claimed that various websites (all linux ones :)) ) had a good fix.