Norton Antivirus Activation Error is a common issue faced by many users while installing or activating the software. Norton Antivirus is one of the most popular antivirus programs available in the market today. It is known for its excellent virus protection and security features. However, users may experience Norton Installation Error due to various reasons, which can prevent the software from functioning correctly. There are several types of Norton Antivirus Activation Error, and each has its unique cause. One of the most common errors is the "Invalid Product Key" error, which occurs when the user enters an incorrect product key during the installation or activation process.