Is there a switch in the avast4.ini file or another option to disable pop-up scanning notifications to the display?
Sure, just uncheck the option “Show detailed information on performed action” that you’ve changed… The default behavior is unchecked.
See Advanced tab of settings of the providers.
For avast4.ini file information: http://forum.avast.com/index.php?board=2;action=display;threadid=1647
Welcome 8)
Sure enough, it was the webshield. Many thanks!