Make sure that you signed in as an administrator.
Click Windows Start button > Control Panel > Performance and Maintenance > System, in the left pane, click Remote Settings.
Click the Remote tab, select the "Allow users to connect remotely to this computer" check box, and then click OK.
A user account that will be used to connect to Remote Desktop has to be allowed to do that. If the user account is a member of the Administrators group it is already allowed
to connect and you can skip this step, otherwise click Select Users.
Enter a user name and click OK button.
Click OK button.
The user account has to be password protected in order to be able to access Remote Desktop.
Click Windows Start button > Control Panel > User Accounts.
Click on the the user name.
If you see Create Password in the options list, it means that the account does not have a password.
Click Create Password and follow instruction to create a password.
Click Windows Start button > Control Panel > Security Center > Windows Firewall.
Make sure that "Don't allow exceptions" option is not selected.
Select the Exceptions tab, and verify that the Remote Desktop check box is selected