Thanks for the response.
I can, using user accounts from the control panel, get rid of the welcome screen. But that's not the problem. There are other users set up on the computer. The problem is how to get past the welcome screen to the desktop. The regedit will require putting up a username and password for each user, and I am not sure my friend will understand (he is totally new to computers) how to edit the registry or setup (using registry) passwords for each user and so on.
My friend does seem to want the screen with the ability for each user to log on. I am wondering if there is a better and simpler solution to the problem.