Put the Oz Report on your Avast whitelist:

Open the Avast user interface and go to ‘Settings‘ » ‘General‘.

Find the tab ‘Exclusions‘ and add specific programs to the ‘File paths‘ tab. 
(i.e. http://ozreport.com)

Added applications and/or paths will now be excluded from any Avast scanning.

http://www.getavast.net/support/managing-exceptions