Remove common program groups from Start Menu
User Configuration\AdministrativeTemplates\Start Menu & Taskbar
Removes items in the All Users profile from the Programs menu on the Start menu.
By default, the Programs menu contains items from the All Users profile and items from the user's profile. If you enable this policy, only items in the user's profile appear in the Programs menu.
To see the Program menu items in the All Users profile, on the system drive, go to Documents and Settings\All Users (WINNT)\Start Menu\Programs.