I'm not getting the avast block anymore (are you?), just
Fatal error: require_once() [function.require]: Failed opening required './initdata.php' (include_path='.:/usr/local/php53/pear') in /home/ccleaner/public_html/index.php on line 41
So I think this is a case of a buggy website, not a virus. They've cut themselves off from the outer world by making their registration private and not providing a working email address to contact them. So they may still be unaware.