Cheryl, thanks for re-posting the directions about Vista User Accounts. It led me to try again; the reason I couldn't find "Turn user accounts on or off" was that I was using the default Vista view of Control Panel; you can't see that message unless you are in Classic view; I never located it anywhere in the default Vista view. Maybe someone could describe the procedure to be able to see "Turn user accounts on or off" in the instructions for RMC, because I bet I'm not the only one who hasn't mastered all the new "features" of Vista.

It works!

Many, many thanks!