More and more Mac users run Windows on their Macs, either with Boot Camp or with virtualization software, such as VMware Fusion or Parallels Desktop. This presents new security risks to these users, many of whom are unfamiliar with Windows security issues.
A Macworld article, Living with Windows: security, looks at the issues Mac users need to know about, and shows how software such as Intego VirusBarrier X6 protects both Mac and Windows operating systems.
Just a quick plug for Intego's VirusBarrier X6 Dual Protection, which includes VirusBarrier X6 together with great antivirus software from BitDefender. It allows Mac users to install great security software on both platforms for just a few dollars more than the cost of VirusBarrier X6 alone.