Enabling Remote Desktop Connection (RDC) Remotely...

I have run into many situations where I need to remote into a computer, but can't because RDP is not enabled on that computer. So I want to enable it remotely because either I am too lazy to get up and access a network computer or cant access a network computer because it is behind a locked door. There are a few ways to do this.
The first is to add a network registry and then change a value. To do this:

1. Open regedit | Start > Run > regedit
2. File > Connect Network Registry
3. Then type either the name or the IP of the computer to connect to and press Check Names.
4. Press Ok then you should see the network registry under yours in the left pane.
5. We are going to change the value of fDenyTSConnections and it is under
• HKLM\System\CurrentControlSet\Control\Terminal Server
6. Double click fDenyTSConnections and change the value to 0.
7. Now you should be able to remote it.

NOTE: If you receive and Access Denied error when trying to access HKLM, then check your security settings on the remote computer (this most likely means physically accessing it).

Another process would be to download PSTools (a light-weight telnet-replacement that lets you execute processes on other systems) from Microsoft. Download and extract PSTools into a folder. In command prompt (Start > Run > CMD) CD (change directory) into that folder and then execute the following command:

• psexec \\IP reg add "hklm\system\currentcontrolset\control\terminal server" /f /v fDenyTSConnections /t REG_DWORD /d 0

There are also some programs that can assist you with enabling RDP.
IntelliAdmin has a freeware program that will enable RDP remotely with a GUI, it also has some nice additional features. It can be downloaded here for free.