ClamAV works as long as you have 64bit and 32bit c++ 2010 redistributable. Right now the installer only installs 32bit, next release there is a check that if it fails to start 64bit ClamAV for any reason it starts 32bit ClamAV. We will also be looking into adding a check into the installer to install the correct c++ 2010 redistributable.
Matt Petty
Senior Software Developer
SmarterTools Inc.
www.smartertools.com