system
5
Hi,
Had the same problem.
If you look in the .avast folder in your home dir there is a file called avastgui.log.
This file will tell you why all the files occur in the list.
It doesn’t however explain why you get the error message! 
My files were on the list due to: Permission denied, No such device and a few with Invalid argument.
Maybe the Tech can shed some light on this?