Thanks Nathan for this notification, I seriously recommend visitors run this tool, even if you do not "think" you have been affected, we at Neowin receive alot of emails that appear to come from machines that are unaware the email is sent. Its rather annoying! and a sign that the person sending IS infected with this or other viruses.
Due to the increased rate of submission and level of damage, Symantec Security Response is upgrading W32.Goner.A@mm from Category 3 to Category 4.
W32.Goner.A@mm is a mass-mailing worm that is written in Visual Basic. The worm has been compressed using a known Portable Executable (PE)* file compressor. The worm can spread its infection using the ICQ network as well as by email using Microsoft Outlook. If IRC is installed, this worm can also insert mIRC scripts that will enable the computer to be used in Denial of Service (DOS) attacks.
Symantec Security Response has posted a removal tool to assist in eradicating this worm. Please go here to read the instructions and download the removal tool.
Download: Removal Tool