Many of our clients enjoy remote IT support to reduce costs and improve efficiency. Microsoft has published a good article on getting RDC up and running on your Windows XP machine.
First, you’ll need to make sure that the computer you’d like to remotely connect to has RDC enabled:
right-click on My Computer
click the "Remote" tab, check the "Allow users to connect remotely to this computer" box, and click OK
Next, you want to make sure that the Windows Firewall does not block the connection:
Control Panel > Security Center > Windows Firewall
under the "General" tab, make sure that "Don't allow exceptions" is not checked
Now, you’ll need to verify that RDC is in the exceptions list:
click the "Exceptions" tab, and verify that the "Remote Desktop" box is checked, and click OK
The Windows XP system is now ready to accept Remote Desktop Connection (RDC) requests.