UAC is a security feature that was firstly presented in Windows Vista., and now in Windows 7. UAC enables the user to run as standard user, and elevate only when an administrative operation is performed. Here is a 10 mins video which explains on the basics of UAC and its improvements in Windows 7.
Also See this video – VirtualStore: File / Registry Virtualization in Windows 7
About Author: Vijay is a passionate Technology Evangelist & a Photographer at iclickd. He was also a former Microsoft MVP from India. Contact Me.