There is a new virus out now called Wozer - it pretends to be a Superzone eCard from a secret admirer. If you open the attachment, it infects your computer and can spread to all other computers on the same network with you. As always, never click on attachments, especially from strangers!
Seems like our parents taught us all this: Don't talk to strangers, don't take candy from strangers, don't click on attachments...