Extract Zen 6.5SP2 into a folder than run Panda AV and scan it. If you
don't have Panda, you can emulate this by using the online scanner in IE;
http://www.pandasoftware.com/product...ACHEHINT=Guest

It detects trojans and *cleans* then;
http://www.pandasoftware.com/virus_i...eteccion=48771

The trojan is updatebin.tar inside of various JAR files such as inside
installer.zip

False positive?