This virus is called the W32.Swen.A or W32.Swen.MM and from all the tech
advisors I have spoken to it's very hard to get rid of.It attacks through
your email,or through newsgroups and when you take the steps to delete
it,the sneaky thing will install itself all over again.
For more info go to www.symantec.com
I have been told that it may mean deleting all files,reconfiguring your
internet setup,and generally being ****ed off in the process.Good Luck!