Help Fight Alzheimers with your PC

If you leave your PC running for hours at a time unattended, either intentionally or forgetfully, ease your conscience a little by downloading FOLDING AT HOME,
a software app that waits till it sees no activity on your PC for a few minutes, then says, "Hey? Mind if I borrow your brain to run scientific calculations on enzymes and other scientific stuff, so you can avoid having your brain turn to swiss cheese in ten years?"