A new demo has been added in the Microsoft Windows XP Professional demo portion.The detail of this demo is

Title: How to Remove Shut Down from the Welcome Screen in Windows XP

Objective: The objective of this demo is to teach you how to remove shut down button from the welcome screen in Windows XP. If you are using welcome screen then by default, you can shut down the system without logging on to your account.  If you enable this option then no one can shut down Window without logging on.

If you are a subscriber, then click the Demos link in the navigation menu to view the complete list of demos.