http://i.imgur.com/YytXVej.png
clic details and after scan
Is this like the situation I posted in the https://forum.avast.com/index.php?topic=201522.msg1390112#msg1390112 beta sub-forum ?
If so are you using the avast beta version 17.4.2294 (I also got it in the previous beta 17.4.2293) ?
If not what avast versions and Operating System are you using ?
ok, it’s same. once again Forgotten to note the version in my post. (17.4.2294 for llatest post)
Well some good news, that bug appears to have been squashed, certainly for myself and another user in the topic link that I gave.
It has I believe been resolved by a micro update, reboot your system and see if it is applied.
It looks good after reboot, no notification 
not good… must wait more minute after reboot… and same 