You could do that under XP, but needed a separate user account for administrator. It was also more of a hassle, as you always had to enter the password when sta

You could do that under XP, but needed a separate user account for administrator. It was also more of a hassle, as you always had to enter the password when starting a program as Administrator. I ran with such a setup on my desktop, and remember that to install programs I usually logged out and logged in as Administrator again. Vista introduced a model that was almost as good, but made it more user-friendly and the default.