Today I got some sound notification during Windows 7 booting, as if a threat was blocked. After system loaded and I was able to open Avast window its notification history did not contain anything related to that sound. I reset PC one time and it did not reproduce.
First I send a feedback through "About"\"Submit feedback", but it looks like this feature is not supposed for getting an actual conversation with support team, so that I could send some logs if needed (UI does not inform if logs are sent automatically).
Avast Free 17.9.2322, build 17.9.3761.278.