What remote admin functions are you wanting to do? Remote Desktop is built in, though it doesn't allow collaborative sessions (IE, the user is presented with a lock screen while remote desktop is connected), but works well normally. You can also use the Microsoft Management Console to connect to a remote computer to see the event log, and other functions. The MMC on your local computer is what is run when you right click My Computer and choose Manage. One of the menus has an option to connect to a remote system. Functions not in that default console view can be opened by running the appropriate .msc plugin.