Use this URL Norton.com/setup to get you to your Norton Account
Enter the email address and password associated with the account
Click onto the Sign In button
When logging in for the first time after purchase, or at any time from a device that does not have Norton Security installed, you may get prompted to select one of the two choices: Install on this device or Install on another device
Click Agree & Download to get the software downloaded and installed onto your current device
If you close the window from the above step, you can always get back to it by going into the Devices tab. In any case, Norton account interface is very intuitive and features the Download button in tabs like Home, Devices, or Services.