If you have ever wondered about what you should do with that old, slow computer stuffed in your closet, this might be the answer. Most computers slow down when the operating system becomes overburdened with junk files over time or when corrupted by a virus. Typical repairs can be costly, so most people simply buy a new machine. You don't have to do that. For about a buck, you can revamp that old machine into a fully functional computer that works...