|See if this link helps:|
I found it via Google - using the search words/string:
how to download norton antivirus with product key
It appears to have various scenarios listed; so hopefully one of them will be yours?
Norton is (for some weird reason) not at all simple or easy to actually download - with or without a legit key. Their info seems to be very thin with regards to actually obtaining (downloading) the software after one has bought a legit key from wherever.
As stated by others above, most of us here do not recommend Norton anti-virus; there being other free (and in our collective view) better utilities around. None of them are as resource intensive as Norton - and again they are free and work as well, if not better.
Also we are all volunteers here, offer free advice to the best of our abilities; do not work for Norton, nor MS etc... Although there are one or two contributors who come across this forum who do work for Norton or similar companies, and when they do they will usually indicate their situation and try to be as helpful as they can,