Not that this old XP machine is still running 2 years later but if you want to destroy a computer, this is how it's done...
If you want to really put that ancient thing down once and for all, open it up, make sure it's running, and pour a little water over the motherboard. Make sure, of course, the water travels all over the board. Immediately after the machine dies, AND IT WILL, unplug it from the wall, dry up any leftover evidence, and place the cover back on the machine. This will send your folks running to the Apple Store for sure!