For the last two days whenever I boot and Avast auto-updates the database it announces it has updated TWICE with a few seconds in between the banners and announcements??? I have never encountered this before. I did a search with MB but no infections were found! Is this an indication of an infection or should I uninstall and reinstall AVAST. 
if you look in the normal forum section (not virus and worms) there is a topic about it