Ramblings from another nerd on the grid
Attack Surface Analyzer is developed by the Trustworthy Computing Security group. It is the same tool used by Microsoft's internal product groups to catalogue changes made to operating system attack surface by the installation of new software.
Attack Surface Analyzer takes a snapshot of your system state before and after the installation of product(s) and displays the changes to a number of key elements of the Windows attack surface.
See the instructions and get the download @ http://www.microsoft.com/en-us/download/details.aspx?id=24487.