sentences:  A single build of Neptune, 5111 (which still carried the branding of Windows 2000 in places), revealed early work on the activity center concept, with an updated user account interface and graphical login screen, common functions (such as recently used programs) being accessible from a customizable "Starting Places" page (which could be used as either a separate window, or a full-screen desktop replacement).It was later confirmed that Microsoft were planning a successor to Neptune known as Triton, although it was originally thought to be a service pack to Neptune.However, the project proved to be too ambitious.