Virus

Trojans can be grouped into seven types . to better understand what Trojans can do , these types are outlines in the following lists .

i) Remote access – remote access Trojans ( RAT ) allows the attacker to full control over the systems . SubSeven is an example of the type of Trojan . Trojan are usually set up as client / server programs so that the attacker can connect to the infected systems and control it remotely .

A computer virus is a computer program that can copy itself and infect a computer without the permission of the owner.
Viruses are sometimes confused with computer worms and Trojan horses, which are technically different.
There are different types of Virus . . like
i) Boot viruses
ii)Program viruses
iii)Multipartite viruses
iv) Stealth viruses
v)Polymorphic viruses
vi)Macro Viruses
vii)Active X