If you use any version of Windows, an antivirus program is an absolute necessity to protect your computer. If you use a Macintosh, an antivirus program is an option. Although a handful of Macintosh viruses exist, the main purpose of any Macintosh antivirus program is to screen out Windows-specific viruses that you may accidentally pass on to Window...

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	www.macnn.com/articles/08/03/25/first.look.antivirus/