There is a new trojan being spread through emails, please be careful not to open any unfamiliar emails. Read about it here.

"Dubbed Trojan.Xombe, as in zombie, by most security firms, the Trojan shares some characteristics of the Swen worm line in that it masquerades as a message from Microsoft and purports to carry a security update in its file attachment. However, unlike Swen, a worm that first appeared last September, Trojan.Xombe doesn't self-replicate."