Remote desktop connections are not enabled by default in Windows 7 and later, and although I normally enable it when installing PCs, there has been the odd occasion where I find that I forgot just when I need it!
There are four steps to complete to remotely enable RDP:
1.Open ports in the Windows firewall
2.Start the Remote Registry service
3.Change a registry setting to enable Remote Desktop
4.Start the Remote Desktop service
Full details can be found in an article by Anthony Eden.