Start>My Computer...Properties

I've got a tab that says REMOTE

On that tab I've got REMOTE DESKTOP frame - when I can "Allow users to connect remotely to this computer".

I've only ever done this in-network - on my office LAN. From the outside world I've only ever connected to a server with RDP. Servers allow only two non-licences RDP sessions - and they don't take over the "desktop" like when you RDP into a workstation.

btw - if you cannot find remote desktop - do a start>run and the program is called MSTSC