The one thing I hate whenever I go to buy a new device like a new computer is what do you do with the old one. The new computer is so much faster and enjoyable than the old one. If you're like me this problem has plaged you too. So I begain looking into possible uses for that old pc. According to Kevin McKean, PCWorld, your old pc can be used to research cancer. A small program can be downloaded onto your old computer and when your old computer is idale, your computer can run computions.