Sasha and I are talking about the same.
That thread (or mine here) has the solution for the problem:
[i]Go into your avast! anivirus directory. Make a new sub-directory for your new sounds. Save all those additional sounds from my package into that directory.
Go into Control Panel/sound properties and under avast! antivirus sound events, point the path for each and every sound to new sub-directory with new sounds you just created… remember ?
avast! will never change those settings again…[/i] 