There is a really nasty virus going around via msn messenger, I have had it from 2 of my contacts. With both I was told that the contact had a picture of me and to click the link. If you get anything from anyone even your most trusted contacts that has an .exe file ending do not open it.
I understand that AVG and Norton currently are not picking this one up, I don't know about Panda, Sophos and McAfee.
Bex