After a major problem with this beta forced me to do a clean uninstall and reinstall, it has begun giving me this same problem. Mine seems to be inconsistent, though; the popup "Virus database has been updated" doesn't seem to get stuck in the "up" position, but it sometimes doesn't display at all, and the sound often doesn't play. However, other voice and popup notifications, particularly the "scan completed" and "virus has been detected" seem to be fine.