The Windows registry is a very tricky thing to deal with. It definitely has its purposes. It helps maintain individual user settings and file associations. The registry acts like the central nervous system of your computer and if it gets damaged then the performance of your computer can suffer. If this is happening then you can use a registry cleaner to help you solve this problem. The best registry cleaner software is RegCure. Made by ParetoLogic software, RegCure can be a huge help when it comes to thoroughly cleaning out a cluttered and corrupted Windows registry. I personally use this program and have had great experiences with it.