You would need to ask Norton if this is possible or not.
"Justin" <Justin@newsgroup> wrote in message
> so i recently had the vista antispyware 2010 so i reformatted my computer
> now i installed the norton 360 again but if i put the product key in the
> norton on my account it will say i have used up all 3 keys is there any
> way i
> can like delete that i used a product key in the first place(i only want
> on 2 machines for right now so when i get a new computer i can also put it