new laptop and NAV vs NIS

I just purchased a new laptop and purchased norton anti virus from the retail store (for 2 years on 3 pcs).  after doing some additional research i wish i would not have done this and instead purchased norton internet security.  i know NIS costs more, but is there anything i can do to upgrade and not lose what i paid for the 2 years of NAV??

 

thanks for any help.