NIS 2009 Upgrade???

Hello,

      Ok hey everyone, so I wondering if anyone can answer this question I have. So I bought a laptop last year along with Norton Internet Security 2009. The subscription is about to expire, so I was wondering since the norton came for 3 Pcs, if i would be able to install it once again on my same computer once it expires, and then if I could just upgrade to a newer version for free, 2010 or 2011, and if that upgrade would last for the whole year or if its just a trial of some kind.  Or do I need to buy 2010? Thanks a lot, I would really appreciate any insight.