Several things more about BadTrans.B "BadTrans.B does not require the email receiver to open the attachment for it to execute. It uses a known vulnerability in Internet Explorer-based email clients (Microsoft Outlook and Microsoft Outlook Express) to automatically execute the file attachment. This is also known as Automatic Execution of Embedded MIME type." So if anyone is using Outlook: 1. Does not have Microsoft's patch for this problem: http://www.microsoft.com/technet/security/bulletin/MS01-020.asp. 2. Is not using ZoneAlarm Pro (must be the Pro version), version 7 or later (versions 2001 or 2002) of Norton Anti-Virus running in realtime mode with the latest signature file, or McAfee VirusScan version 6 running in realtime mode with the latest signature file. NOTE: People who's computers DO NOT meet the criteria listed can be inffected by this worm just by receiving an email with BadTrans.B attached to it. You do not have the try to open the attachment.