false expiration date

Bought a laptop with a trial version of norton on it already.   I loaded my Norton Internet Security on it  in Feb 2011.  My norton expired and stopped before my year was up.  I contacted best buy and they suggested i Delete it through control panel.  When I tried to reload Norton said i had already used my 3 license loading and would not be allowed to continue.  How can i reload?

 

chrissif