The worm u got is most likely the new one ravaging the internet... Just a piece of free advice that I keep telling my grandfather (because he infects his dell several times a week) is if you do NOT KNOW the email address do NOT open it... and even if you do, if its a title thats unusual for that person do NOT open it. I'd rather miss an email that mighta said "hey how u doin bro, haven't seen u in a while" then inefect myself with a virus.
Yes I'd go to www.symantec.com and download the updates for ur virus scanner, or if u contact me i might be able to help you as well. Drop me an email if u need anything.