Using the Avast User Interface (Avast UI) you can disable options such as: insert note into out going mail; audio notices; social networking; pop-ups and others.
Open the Avast UI
Navigate to the Avast icon in the Windows notification area. This is to the right of the Taskbar at the bottom right of the screen. If not visible click on the arrow head to the left of the notification area to reveal hidden icons. Right-click on the Avast icon and select Open Avast UI.