Hello,
send us (virus@avast.com) the file to analyze to fix possible faslse positive, put False positive to email body.
How to extract the file from chest:
Create a folder called Suspect in the C:\ drive, e.g. C:\Suspect. Now exclude that folder in the Standard Shield, Customize, Advanced, Add, type (or copy and paste) C:\Suspect\* That will stop the standard shield scanning any file you put in that folder. You should now be able to export any file in the chest to this folder without avast alerting.
Milos