XYZ computers has started practicing safer browsing, without having to fully install Linux on their Windows box, or play with dual booting. Thanks to virtualization, they can have the security that comes from browsing on a much less commonly attacked OS.  Check out Player, the free version of VMWare’s Workstation.
“If you are a security conscious or have to spend some time on less reputable web sites a great option is to use either Linux or OS X. Because the high majority of security threats which we are exposed to are designed to compromise Windows, by moving to a non-Windows operating system those threats no longer matter. This is not true all the time, especially for spam and phishing, but the possibility of a virus or spyware is greatly decreased. The problem is, of course, that people are reluctant to move to a new operating system, even a free one. A solution to this is virtualization, or basically running one of these non-Windows operating systems from within Windows. This will enable users to create a virtual workstation entirely on their existing computer, something which will not interfere with Windows and will not require a separate computer or even a dual boot.”

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