From click here
A program that neither replicates nor copies itself, but causes damage or compromises the security of the computer. Typically, an individual emails a Trojan Horse to you-it does not email itself-and it may arrive in the form of a joke program or software of
Most anti-virus programs will detect trojans but noy all are good at removal. click here and click here are.
You can do an online scan for trojans if you click here