Duplicate security status alert removal

I renewed my subscription to Norton 12/09.  When they did it, I don't think that they removed my old subscription and I keep receiving pop ups every 10 - 15 seconds telling me that "Virus protection is out of date"  I am instructed in pop up to use my existing Norton Product alerts and turn off redundant window security center alerts.  I can't find where to do this.  Any suggestions?