There are many reasons why you wouldn't want your operating system connect to Microsoft's server, be it for practical reasons, be it suspicion or simply idealism. Based on the source-code of the award-winning xpy, Vispa allows you to easily tweak your Windows Vista for better privacy and security, even system performance. Do a few clicks rather than finding the write registry keys or program settings.
The only recommendation I can give is not applying settings without vague knowledge of what you're doing. Not every setting is desired in every environment. Vispa is no tool for beginners, just a more convenient way of tweaking your operating system.