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 phishingprotection.
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% US retail market share for security suites as of the first half of 2007. Competitors, in terms of market share in this study, include antivirus products from CA, Trend Micro, and Kaspersky Lab
Norton AntiVirus runs on Microsoft Windows and Mac OS X. Windows 7 support is in development for versions 2006 through 2008. Version 2009 has Windows 7 supported update already. Versions 2010, 2011, and 2012 all natively support Windows 7, without needing an update. Version 12 is the only version fully compatible with Mac OS X Lion
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