pop-ups keep coming saying I need to renew my Norton

Aloha from Hawaii,yesterday 7/3/11 I renewed my Norton protection subscription for a year.I keep getting pop-up's that tell me my computer is vulnurable to virus attacks and I need to renew my subscription.Did I not activate the system or is an error on Nortons side.also when I went to my account it told me I had 365 days of protection left?