Trojan Horse ??? What's that ?????????

Trojan Horse is a malware which is widely believed to belong to the 'virus' domain. However, there are a few differences which are worth discussing:
Trojan Horse is quite similar to virus in attempting to infiltrate a computer without the user’s knowledge and of course ! 'consent.' A Trojan Horse, often presents itself as one form while it is actually another. A recent example of malware acting as a Trojan horse is the recent e-mail version of the "Swen" virus, which falsely claimed to be a Microsoft update application.
Trojans typically do one of two things: they either destroy or modify data the moment they launch, such as erase a hard drive, or they attempt to search out and steal passwords, financial
credentials, and other such confidential information.
Trojan Horses can be a bigger problem than other types of viruses as they are designed to be destructive or disruptive, as opposed to viruses and worms where the coder may not intend to do any harm at all. Essentially this distinction does not matter in the real world. You can lump viruses, Trojans, and worms together as "things I don't want on my computer or my network".
So.....how do you prevent the attack ?
The methods for dealing with Trojans are generally the same as for those for dealing with viruses. Most virus scanners attempt to deal with some of the common Trojans with varying degrees of success. There are also specific "anti-Trojan" scanners available. You may also want to try the 30-days free trial of Trojan remover free download here or even here.