I use Avast antivirus, whenever the virus database is updated, message appears that the virusdatabase is updated. I don’t want any messages, how do I disable it?
updates are automatic.
In settings, I have already disabled all messages.
Right click the ‘a’ blue icon.
Program Settings.
Update (Basic) tab of settings.
Details
Choose Silent update and remove all confirmation/progress options you don’t want 
Have you tired Running Mode ‘Silent’ see image and disable ‘show sliding box after automatic update.’