There are two default users that can not be removed. Administrator and Guest. Note, only the default users are available in the LITE version. As in NT, groups are sets of users to whom you assign certain privileges. You might have 'Administrators', 'Users' and 'Dial-in' groups, each allowing different access rights.
Users can belong to one, several, all or no groups.
Groups can not be added in the LITE version. Assumptions on these locations allow clients to be logged even if they are not logged in with GateKeeper software. This branch is not visible on the LITE version. This is the heart of WinGate. All the services are added edited or configured here.