Technical,

I think EZ Trust just one year for free (with firewall and antivirus tools) won't be suitable for those ones who believe in layered defense: one application for each one defense need.
The installation for EZ Armor allows you to install both or either the Firewall or Virus Checker. They are separate applications. Since EZ Firewall is the same as Zone Alarm Pro, you'll get to use it for free for one year. Then you can use your favorite Anti Virus such as Avast along with it. ;)