This morning turned on my computer, connected to the internet and avast updated my defs to 120724, first just heard the voice that my virus def was updated, then heard it a 2nd time with the green popup, just as described by other users. About an hour ago it happened again with the 120724-1 update. Never happened to me before today. I am a Windows 7 user by the way, so it is not just XP & Vista.