@Vlk,
I visited the link and see the pop-up there. However, Avast5 has never given that notification here, even after the program knows that a program update is available. I do have "Ask when an update is available" under Update Settings | Program. Perhaps there is a built-in delay for the notification pop-up after Avast5 has received notification from the server.
Also, good to know that administrative access isn't necessary for program update thru avast service(via the built-in update function). Thank you, Vlk.
Avast5 is running fine, and I am very pleased with the UI and all the various settings and information provided therein.