Ahnlab, an Internet security firm, yesterday issued an alert to MSN Messenger users about infection by the malicious computer virus called “Trojan Horse.” The virus is spreading across the Internet through the instant messaging service, which has some 5 million users. The virus becomes activated when the user downloads a file contained in a message which reads, “would like to send you the file, sins.exe.” Once activated, the virus allows others to have access to all the data stored in the victim’s computer, Ahnlab said. In addition, it could also slow or disrupt the infected computer’s system. Full Story