I installed Avast 4.8 home edition in a friend's computer. Now on boot-up, Windows Live says to 'remove an interfering program': Avast. I know there is some sort of Microsoft anti virus program; do I need to remove it? And if so, exactly how do I do that. The computer seems to work OK, but it is giving that warning message, and I want to avoid any future trouble. Have other Vista and Avast users run into this problem, and what did you have to do. Many thanks!