No doubt Notorn is a top-tier security product to protect data and identity from having a safe browsing experience. However, it is obvious to encounter some problems while setting up the security product and using it. One of the most common errors users face is the Norton product key not working. The reasons for this problem are the wrong product key or an invalid key. Various solutions are available to help you get out of this problem. Access the complete and comprehensive guide here to smoothly use your security product.