Okay so a year ago i got Norton 360 for my computer. it came with protection for 3 computers. i use one and and my brother paid me for the the second one. so now a year later my subscription is now over. is it possible to use that 3rd use on my computer? or is that 3rd use only for a different computer? and if i could use it on mine how do you do it? i tried by putting the product # in and it brought me to a page where i needed to buy it with a credit card/ any suggestions?