Trojans are malicious applications that pose themselves as legitimate software in order to trick users to install them. Once on the victim's machine, it may run any number of malicious process to steal vital information or inflict damage to other software.
This Trojan does not destroy anything, but is very annoying. It copies its link to a start-up folder to be run during Windows bootup, does not allow it to "kill" its task, and makes itself known every time. It is pretty hard to remove, because it blocks its application and VB DLL, re-creates its link in the start-up directory or even the whole directory if deleted. Upon attempting to kill its task, the Trojan opens several more essences of itself as 'punishment'.