Preinstalled NIS

I just purchased a new laptop with Norton Internet Security (NIS) preinstalled. I wanted to utilize an available download of my current NIS subscription, so I just downloaded and installed the program from my account website. The process seemed to complete well. Is this the recommended procedure, or should I have uninstalled the preinstalled NIS first?

 

An additional question, could I do the same process with an available N360 install over a preinstalled NIS? I have heard that, in the past  at least, I could not do this because the Norton products had to be in the same family. Please clarify.