Posting VT result`s will not help detecting it, what helps is if you send the sample(s) to avast!...
But i think this is an False Positive.....
sigcheck:
publisher....: DivX, Inc.
copyright....: (c) Copyright 2000 - 2010 DivX, Inc.
product......: DivX Setup
description..: DivX Setup
original name: DivXSetup.exe
internal name: DivXSetup
file version.: 2.0.4.2
comments.....: n/a
signers......: -
signing date.: -
verified.....: Unsigned