PC Maintenance Handbook – 2nd Edition. Improve your PC’s performance, speed, and reliability. This handbook is designed to help you find ways to maintain your Windows PC and ensure it remains clean and speedy throughout its life. Computers quickly get bogged down by junk files, invalid registry entries, a fragmented hard drive, spyware, adware, low disk space, and more. A speedy system is just a few clicks away, but sometimes it’s hard to know where to start or even what to do. The purpose of this eBook is not to define the ultimate solution; its purpose is to give you simple, unbiased advice on what have been found to be the best options out there.