Christmas Virus Spreading on Net – “The new mass-mailing worm is variously known as W32.Reeezack and W32.Zacker and is spreading via Microsoft Corp.’s Outlook e-mail client as well as the MSN Messenger instant-messaging client.”
So, update your virus checker’s definition files, head over to Microsoft and get the latest security fix for Outlook and Outlook Express. Or, consider changing to a newer, safer platform for mail, news and instant messaging.