I am using the French version of Avast 6.0.1327 free.
Frequently, when starting my computer with Xp, everything seems correct.
The tray icon showing normal but when I pass the mouse over the Avast Icon, I see : (In FRENCH) Avast antivirus: AVERTISSEMENT, votre système n'est PAS PROTÉGÉ. ( Not protected).
I opened AVAST and its says that my computer is secured and a big green tick.
Is it a false alarm or something wrong?
Meanwhile, found a temporary solution:
command prompt - services.msc and restart the AVAST services,
then the text for the avast icon tray say: your system is protected.
PS. I also saw the same problem win a win7 portable computer last week