Norton AntiVirus, developed and distributed by Symantec Corporation, provides malware prevention and removal during a subscription period. It uses signatures and heuristics to identify viruses. Other features include e-mail spam filtering and phishing protection.
Symantec distributes the product as a download, a box copy, and as OEM software. Norton AntiVirus and Norton Internet Security, a related product, held a 61% antivirus market share as of 2007. Competitors, in terms of market share, include antivirus products from CA, Trend Micro, and Kaspersky Lab.
Norton AntiVirus runs on Microsoft Windows and Mac OS X. Version 16.5.0.135 is the latest Windows build.Version 11.0 is the latest Mac build.

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