I think it was just a glitch due to the way I was trying to minimize avast. It kept coming up and bothering my screen space, so I minimized it a few times. I thought I saw that it had completed, but then noticed the icon in the task panel. When I clicked the task panel icon avast seemed to still be running. I think this was user error, and I will run it again tonight when I'm not using my computer to see. Thanks, Chris
P.S Not using XP, Windows 7