Remote Desktop Connection (RDP) allows you to connect to and work on a remote computer from any location just like you were sitting in front of it. For example, you can connect to your office computer from your home computer and carry on with your work.
But in order for you to be able to do that, make sure that you have the option “Allow users to connect Remotely to this computer” checked in the Remote Tab, in the System Properties window, of the remote computer you wish to connect to. If this option is not selected, you will not be able to connect to that computer, using RDP. Refer to the image below.
Similarly, make sure that this option is checked in any computer you wish to remotely connect to, using RDP.
To get to the System Properties window, Right-Click on My Computer and select Properties.
Windows XP System Properties – Remote Desktop Connection
Then go to Start -> All Programs -> Accessories -> Communications -> Remote Desktop Connection and enter the IP address or the Computer Name of the remote computer you wish to connect to and click on the Connect button.
Shortcut: Start -> Run -> type mstsc and hit <Enter> or click on the OK button.