What Norton AV should I get for my Netbook

Recently purchased a Netbook for the sole purpose of just surfing the internet and maybe doing some light word processing.  We have Norton AV on our regular home desktop, but I'm curious if there is such a thing as Norton AV light..  This netbook is a single core 1.66 GHZ processor w/1 Gig of ram, and I'm concerned that the regular version of Norton might be too much for it.  Any recommendations would be greatly appreciated.  Thanks.

 

Jeremy