No matter how much Microsoft supporters whine about how Linux and other operating systems have just as many bugs as their operating systems do, the bottom line is that the serious, gut-wrenching problems happen on Windows, not on Linux, not on Mac OS. -- [link|http://www.eweek.com/article2/0,1759,1622086,00.asp|source]

Here is an example: [link|http://www.greymagic.com/security/advisories/gm001-ie/|Executing arbitrary commands without Active Scripting or ActiveX when using Windows]