I may work for the firm, but ... As a good corporate citizen I just installed the Windows Update item that got pushed out to me. The "Windows Genuine Advantage Notification" tool that's supposed to notify me -- I am paraphrasing the decription that I clicked away already -- whether my copy of Windows is genuine and to help me acquire a legal copy if it finds out that its not (whatever that might do). I think I have a bit of an understanding why there's such a tool and why that Windows Genuine Advantage program exists. Like it or not, we make software that we ask people to buy.
But why, why, why does that particular update want me to reboot my machine after the install?