There is no point buying and building the fastest computer if your Operating sys is running slow because of all the junk it contains so we are taking time out to review this essential piece of software. In conjunction with all our Windows XP tips, tweaks and tune-ups we have been using System Mechanic for a great many years now because it is as far as we know the best software to remove all that junk in your computer that Windows XP collects and get it running at full speed.