I Activated my NAV 10 on anew laptop which turned out to be have battery problems

I Activated my norton anti virus on my new laptop which turned out to be have battery problems with it, and i still have about 360 days on it left !!!!, then the company game me a new laptop(different one) how do i re-activate it on the new laptop?

 

ps: the norton anti virus that i bought has 3 times subscribtions under ONE cd-key, and i am afraid of wasting one of them if i retype it again !!