This method of installing Norton 360 applies whether the program is being installed on the first or extra device.
Visit this URL to sign in to your Norton account: norton.com/setup
You'll notice a Download button on your My Norton website. Press the button.
There will be two options in a new pop-up window:
Accept and Download (to install onto a current device)
Provide a Download Link (to install onto another device)
Click the button of your choosing, depending on the device you are installing Norton software on.
Follow the directions on the screen.