Expand the “Sounds” category under the General pane to find the sound options. How do I silence Avast?, Click the gear-shaped “Settings” icon at the upper right corner of the Avast window to open the Settings screen. This means your games or other full-screen applications will not be interrupted with annoying popups or other messages. This will cause Avast to run in silent mode when a full-screen application is running. Activate the Silent/gaming mode when don’t want to be interrupted.
