|The biggest difference about a Trojan and a virus is that a Trojan is unable to duplicate itself unlike how viruses are able to. Trojan Horse viruses would disguise themselves as executable files and attempt to install themselves when the user runs them. Many unsuspecting users would open these files especially when they are named as another interesting file or some other free download that they think they have downloaded from the Internet. These Trojans are named after the general public's favorite items (songs, games, movie file names etc.) and tempt the user to install them afte it has entered the PC.|
The best solution would be to download and run a scan with antivirus and antispyware software. It is able to run a scan throughout your system and then allows its users to clean out any spyware, adware, viruses or any other malicious software that has been detected. It does its thing automatically and does not require the user to have any technical knowledge. If you have such a piece of protection software, it is very important that you update it frequently to ensure that it has the capabilities to defend against the latest threats. Once my protection software has run a full scan, I rebooted my Pc at home and it was running like new again after that.
You can try this trojan removal tool.