What do they mean by useless? Windows wouldn't boot? or did the computers explode, or did the virus flash the bios with garbage, even then you could resolder a new bios chip on! Would be hard to make multiple computers completely useless!
I'm about to release a arcade space shooter game, called silverspeed. You can download a demo at www.ckmgaming.com. It has simple mouse controls. My three year old nephew can't play it yet, but likes looking at the bosses, he calls them dragons.