A Trojan is a tiny program which is running on a workstation (PC or Macintosh). It is a Tool to control and watch your computer.
In its simplest form, merely records every key that you press, including your username and password when you access any computer network. Usually at some later stage, this recording of your username and password will be retrieved for illegal purposes. Hackers can use it to occupy your computer and do somthing harmful.Trojan Guarder starts a system Process named Guard GHOST to watch all running processes in the system memory , all local files, and opening network ports to search worms and trojan Horses in real time.
Once a trojan or worm appears,even hiding in other programs,Trojan Guarder will display a warning and kill it immediately.Also, Trojan Guarder wll clear all the system link files and registry links of the trojan(worm) at the same time.