Are you using avast! Home or Professional?
How do you start the scan: by Explorer Extension, Virus Cleaner, Simple User Interface or Enhanced User Interface…

The settings for automatic handling a virus file is given only in Professional version but, in Home (Simple User Interface) a window will appear and ask what to do with the virus file (repair, delete, move, move to Virus Chest, etc.) and you can continue the scanning… :wink: