Remote desktop is a windows feature which can be used to access a windows computer from an other windows computer over the internet. Note that to access a windows computer using remote desktop the computer must run on Windows Professional or Ultimate version. Remote desktop does not work if the remote computer runs on Windows basic home version. However you can remote from a computer that runs on home version of windows. Another requirement is that the two computers must be connected over an network. The network can be internet or just a small home network. To do this go to start menu and then control panel. Open the user account from the control panel. Here you can do the settings to allow a user to remotely connect to your computer. This video shows how to use the remote desktop feature of windows.