Win XP Avast ver 17.3.2291 build 17.3.3443.0 no sound upon scan completion. Neither manual or scheduled. No .mp3 files within the Avast folder. Yes, all sounds are checked. Yes, the volume is turned up. Yes the sound work on all other things. No, I am not in silent mode.
Thank you
I preformed the suggested link. Nothing changed. Still no sound Win XP Avast ver 17.3.2291 build 17.3.3443.0 no sound upon scan completion. Neither manual or scheduled. No .mp3 files within the Avast folder. Yes, all sounds are checked. Yes, the volume is turned up. Yes the sound work on all other things. No, I am not in silent mode." Also I noticed that the icon does not animate during scan. Yes, animate icon during scan IS checked.
Thank you
And you did reboot after repair…
Yes, of course, it is Windows not Linux 
Where are the sound files “supposed” to be?
For many versions, the sound simply isn’t working no matter what you try.
I’ve seen it on Windows XP and Windows 10.
Sounds enabled in the settings, downloaded the sounds and placed them in the correct folder etc and it still doesn’t work.
To me it looks like one of the many things avast screwed up.
Oh shoot. Maybe youll find them here. ;D
Look here: C:>ProgramData>AvastSoftware>Avast>Sounds
ProgramData folder is Hidden, so you’ll need to unhide it to find the goodies.
Very few sounds now run in the current version. You should hear “Scan completed” at the end of every manual scan if the file is large enough to run for a minute or more.
I supposedly am showing hidden files and folders, but no folder called “sound” and no .mp3 files or whatever. It also doesn’t appear I can select my own + the icon doesn’t animate during scan. I am thankful the logs files eeem to work. This version does not appear ready for prime time 
See attached.
As you can see I’ve got only four sound files that run now. Earlier versions of avast used to be quite noisier, to the point where it used to announce ‘Your avast virus database has been updated’ several times a day.