If you are using Windows XP Pro, it has its own built in Remote Control
Software.
(In order to set up the remote control software and log in you need
admin privledges) You don't have to be logged in to use it, either.
I'm not sure if multiple people can be logged on at one time though.
If you do have XP Pro, right click on My Computer, click Properties,
click Remote, then put a check mark next to "Allow users to connect
remotely to this computer". Then on the machine that you want to use
to control the remote computer, install the client software (if the
computer you are using is XP, the software is already installed)
(
http://www.microsoft.com/downloads/d...displaylang=en)
After you install it, go to Start -> Programs (9x) or All Programs
(2000/XP) -> Accessories -> Communications -> Remote Desktop
Connection. In the box that says "Computer" put in the IP Address of
the computer you want to control, then hit "connect". If everything is
set up correctly, you should get a login dialog where you would put in
your username and password. To disconnect, go to start, disconnect.