not asked for code key?

I've just moved all my stuff from an old PC to a new PC.

To get Norton onto the new pc, I signed in at norton and it listed my purchaed products. I then downloaded that file to my old pc & copied it over to the new pc with a flash drive. from the new pc i ran the exe. Norton seemed to load everything just fine and I did an update at this time, however I was never asked for my code key. I thought this was strange, any reason why i was not asked? was it embeded in my download somehow?

thanks