Norton Internet Security, developed by Symantec Corporation, is a computer program that provides malware prevention and removal during subscription period and uses signatures and heuristics to identify viruses. Other features include a personal firewall, email spam filtering, and phishing protection. Symantec distributes the product as a download, a boxed copy, and as OEM software.

Norton AntiVirus 2009 Classic does not include spyware or adware detection. The Classic edition is marketed alongside Norton AntiVirus 2009, which does include spyware and adware detection. Two variations on Norton AntiVirus 2009 are also marketed by Symantec. The Gaming edition provides finer control over when Norton downloads updates and allows components of the suite to be disabled either manually or automatically when the computer e...

“Powered by Norton 360 Technology. XFINITY Internet customers can now get the #1 ranked Norton Security Suite at no additional charge. Protects against viruses, spyware, Trojan horses, worms, bots, and rootkits. Blocks browser, OS, and application threats; protects against infected Web sites. Blocks phishing Web sites and authenticates trusted sites. Available at no extra cost to XFINITY Internet customers, Norton Security Suite protects...”

“Basic antivirus protection that stops viruses and spyware, so you can safely go online and share. Five patented layers of protection quickly and accurately detect and eliminate viruses and spyware. Protects your privacy and prevents your passwords and identity from being stolen when you surf the Web. Deep clean your PC – our powerful Threat-Removal Layer targets and scrubs out aggressive, hard-to-remove infections that less sophisticate...”

Norton 360, developed by Symantec, is marketed as an "all-in-one" computer security suite. The package includes an antivirus, a personal firewall, a phishing protection program and a backup program. What distinguishes this suite from Norton Internet Security is the inclusion of file backup and PC maintenance capabilities.