Norton Antivirus software is a program that protects your computer and stops viruses, spyware, worms and Trojan horses from entering and causing harm. Norton Antivirus performs constant scans to your computer to protect it as you surf websites, download files and open email. Norton Antivirus is updated regularly and automatically so that your computer remains safe. It is a process where do you enter the Norton Setup Key at www.norton.com/setup to activate & install Norton product. If the user wants to have flawless experience of the Norton antivirus security into their device then they need to setup Norton correctly from Norton.com/setup.