If your computer is slowing down and spitting out lots of error messages then there might be several things wrong with it, but the best place to start is one of the most difficult to deal with sections of Windows; the registry. The registry acts as the central nervous system of your computer, storing all the important preference and settings files that are vital to the proper performance of your PC.
The best way to clean up the registry is to use a Windows XP registry cleaner. These programs make the process of cleaning up the registry extremely easy and uncomplicated. It’s NOT recommended that you attempt to fix the registry on your own by hand. This could lead to even bigger problems. Just use a program like RegCure to help you out.