Has there been any changes to the displays in the Task Bar? I have the yellow splodge icon there and usually when I put the cursor on it a large green box shows the message "You are protected". Today only a small white box reading "Avast Antivirus: Your system is secured" is displayed.
I also have been able to click on the icon to get to the main Avast antivirus screen and this does not seem to be working either. any reasons for this.