The Guardian is a Trojan defence system. It detects any suspicious attempts made by a remote system to connect to your computer. Every time you start the guardian it will check if your system has some typical trojan ports active, and give you a message about what port it is and possible trojan type. When the Guardian is running you can decide if you want to run it like a tray icon or as a normal program. In any case it will pop up immidiatly someone try to attack your computer and also give you a Voice Message telling you about