Buy a cheap ass critical part, even a hdd, from eBay, replace it with the one you have now, fry THAT. He wont know the difference. If he doesn't buy a new pc, you can always replace it with the old one and you'll still have a pc. And if he does, you have an extra hdd to add to your shiny new pc for additional space.

Maybe tonight we'll fly so far away... We'll be lost before the dawn...