Windows 7 SystemTweak takes a number of actions to ensure top performance by your Windows 7 machine. It works on your registry to reduce it's size, eliminate unused things on your computer that may affect performance, and make your computer boot faster by eliminated unused programs and background processes from your start up list. Windows 7 SystemTweak also includes some handy features, like a duplicate file deleter which can make a big difference, especially if you have large media files that are duplicated. Junk files and temporary files are also taken care of, which helps reduce your used up disc space. Defragments your harddrive for optimal performance, and also reports to you so you know where most of your disc space is spent. Overall, Windows 7 SystemTweak could be a useful tool if you want to improve your Windows 7 machine's performance or if you just want to clean your registry.