The registry is like a filing cabinet for your operating system; it contains everything from the last web site you visited to the last program you opened. Over time, it gets loaded with junk and that slows things down. Fortunately, cleaning it up is easy. So easy, in fact, that this home-computing how-to from the folks at Butterscotch can present a complete, step-by-step overview of the process in just over four minutes' time. For detailed instructions, and to get started tidying up your own Win 7 registry, watch this free video tutorial.