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

Title: Encrypt Folder

Objective:The objective of this demo is to teach you how to encrypt a file of folder in Windows XP Professional.
Only users with an appropriate decryption key can access the content. By default, the user who encrypts the file and configured recovery agents has these keys. However, files and folders might be decrypted depending on how they are moved or copied.

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