If someone can create it, some other can counteract it... I'm NOT a software engineer and I don't know what kind of OS do you use, but I had my fair share of virii attempting to infect my systems almost twice or trice at months only to be repelled from the progs that I always leave running while my PC is on (a firewall, an antivirus and a spyware detector), and by the common sense of don't open attachments if I don't have the confirmation that they are from a trusted source. It seems VERY strange to me that you don't know the nowadays endemic virus problem if you regularily connect to Internet or use email... and, yes, today viriui are very sophisticated - and antivirus software too.