constant reacurring virus alert

I hit o'k, but the alert just keeps coming back again and again.  The alert is for -Trojan.FakeAV-.  The alert says that is has detected and removed the virus from my computor.  I have Norton Internet Security 2006 with complete updates and 123 days left on the subscription.  I have done a full virus scan and it says it detected the Trojan virus and removed it. BUT I keep

getting the alerts and I O'K them and they keep coming back!!!!!!  I'm ready to drop Norton and try something else..........