Sorry, just bumping this thread up to the top again in hopes that someone has an answer to this mystery.
And if I'm reading this right, the avast "sound options" are there but not the original avast sounds.
IE, you could however "assign" Windows sounds to them, not that it would be of any use.
So this is a question of getting rid of the original avast entries themselves- (As far as I know, the avast .wav files are gone).
Maybe not? I never looked.
At least, they don't show up as sounds that can be associated to an event any more.
Thanks for any ideas. I mean, I still use avast.....I just hate mysteries.