You can any of them and then you just need to login to your existing norton.com/setup account. If you do not have a Norton account then you have to make one in order to download your Norton setup.
What is a Norton setup Product key ?
Norton setup product key is 25 characters alphanumeric unique string which is used to activate a Norton setup. Without redeeming the product key you can not download your Norton setup.
How do I find Norton on my computer?
To find out if you already have Norton virus protection free software:
Open Action Center by clicking the Start button , clicking Control Panel, and then, under System and Security, clicking Review your computers status.
Click the arrow button next to Security to expand the section.