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 as good or better than it did the day it was new, whether it's a laptop, a desktop PC, or even a Mac. This book will walk you through the process one step at a time in clear, precise language that almost anyone can understand. This book is well written for the beginner, so you don't have to be technical, or even understand the technology of what is being done. If you can read and follow simple instructions, you can upgrade your computer. Following the instructions exactly as written is the key to your success. Saving an old computer provides a machine to use in another room, a spare in case your main machine fails, or simply having an alternative with a larger screen if your only internet access is your phone. It's also good for the environment, because you won't have to discard another computer.