Not sure if that's for me, but XP Pro SP2, avast home, English version, sound files are in the English folder and they play OK in WMP. The others played OK in avast during test conditions (eicar, etc.) but no VPS Update.
I've just gone into the settings Sounds, settings, Sounds Tab, and it was showing the correct file and location. Despit this being correct I used the browse function and pointed it to the vpsupd.wav file. So I will have to wait for the next auto VPS update to see if this makes any difference.
Just a thought, would it make any difference if in my case I have Updates to 'ask when Update is available' rather than full auto VPS update ?