Hello,
Sorry for the trouble. Have you already downloaded and installed the Norton product? if so, please follow the steps to activate the product:
1. Start the Norton product.
2. At the bottom of the Norton product window, click Renew.
3. In the Subscription window, click I have a key or code to enter.
4. In the field, enter the activation code you have.
5. Follow the on-screen instructions.
Let me know if that helps!
Thanks!
Vineeth
Norton Support