[pavanred]

A Trojan is a piece of software which appears to perform a certain action but in fact performs another such as a computer virus.
It does not propagate by self-replication but relies heavily on the exploitation of an end-user.Therefore, a computer worm or virus may be a Trojan.


Overall picture... Trojan is a software that is un-desirable and it comes along sometimes with softwares we desire.Get rid of them.