Remote Desktop is Microsoft’s built-in software that allows you to access a computer from any other computer via the internet. Remotely accessing your computer can be a valuable resource if you need access to files and other information if you do not have physical access to the computer.
Note: Remote Desktop access is only available in the Professional, Business, or Ultimate versions of Windows. Home editions cannot be accessed with Remote Desktop, but do include the Remote Desktop client so you can access other computers.
Enabling Remote Desktop Windows XP
Enabling Remote Desktop in Windows Vista/7
Once Remote Desktop has been enabled, you will need to locate your IP address which uniquely identifies your computer. If your computer is behind a router, you must configure your port forwarding to provide access on Port 3389. If you are not familiar with port forwarding, more information can be found here.