Trojan Horse Examples

I have lot of time heard about Trojan Horse Virus... But still i don't know What it is??? How to find weather the computer is affected or not??? Can anyone give its example???

Firstly while making threads you must look for the similar threads made before.... Look for the solution in the link given below for similar threads hopefully you find the solution for it...!

http://forums.techarena.in/networkin...ty/1048669.htm
http://forums.techarena.in/security-virus/787141.htm
http://forums.techarena.in/networkin...ity/864827.htm
http://forums.techarena.in/windows-security/1093140.htm
http://forums.techarena.in/windows-update/1103851.htm
http://forums.techarena.in/networkin...ty/1138083.htm

The term comes from the a Greek story of the Trojan War, in which the Greeks give a giant wooden horse to their foes, the Trojans, ostensibly as a peace offering. But after the Trojans drag the horse inside their city walls, Greek soldiers sneak out of the horse's hollow belly and open the city gates, allowing their compatriots to pour in and capture Troy. Trojan horses are broken down in classification based on how they breach systems and the damage they cause.

Examples Are :

Trojan-Spy.HTML.Smitfraud.c [Kaspersky],
Phish-BankFraud.eml.a [McAfee],
Trj/Citifraud.A [Panda Software],
generic5 [AVG]