How do you get rid of the constant popping up of the on-access scanner message
banner?
By not enabling it to start with, this option, ‘Show detailed info on performed actions’ is off by default.
Example of Standard Shield provider, you will have to disable any others that you have enabled, they are in the same location.
http://img.photobucket.com/albums/v325/for-dwr/ShowDetailedAction.jpg
I suggest a browse of the avast help file before tweaking avast.