I've seen that virus before... After a quick trip to Norton's site, here's the quick bit on it.
It's a Lv 2 Spam AIDS worm... In easier terms, it a fairly annoying virus that tries to knock out your firewall(s) & your anti-virus program (hence the AIDS bit), then tries to infect your friends by sending them some type of spam with your name on it.
If you've kept your virus definitions up to date (if you don't, PAY FOR IT!), you should have been protected since July/August. At least it's no Smeggin' Klez virus... I had to retire an 2 E-mail addresses because of it.