Depending on what version of Norton u have, u can download this config (or whatever) file that tricks Norton into thinking it is registered for free updates and what not until the year 2999. ...Not that I condone any of that.
If you want a new computer thats small and powerful, I suppose you could look into a Shuttle system if you want the 'cubie' tower. I haven't had any personal experience with them, but my friend has one and she likes it a lot.