Personal Internet Security 2011 ? pop ups

Hi Everyone,

 

My edition of Norton 360 expired a few days ago, I was on the laptop and the Personal Internet Security 2011 started to pop up on my screen!  I went to Norton site and downloaded the new version. I did a full scan and I thought everything would be ok, But every now and again I get Security warnings popping up for the PIS 2011, It wants me to subscribe for it but I dont want it, Or do I have to shell out more money to stop these pop ups happening. I thought when I bought and down loaded the Norton It would take care of this problem but it hasnt. Anyone got any ideas what Im supposed to do? Thanks