Security ... think about it!
That brings us to the claim that security concerns are behind the move to abandon Windows. The reports suggest that Google has banned the use of Windows in response to the Operation Aurora attacks which Google alleged were state-sponsored attacks from the Chinese government. The flaw in that logic is that it assumes the attacker would be unable to compromise alternative platforms like Linux or Mac OS X. Microsoft Windows--by virtue of its dominant market share--is the target of the vast majority of general malware attacks, so switching from Windows may reduce the daily operational risks. But, when it comes to precision, targeted attacks, alternative OS platforms don't provide any better defense so dropping Windows would not have prevented the Operation Aurora attacks.
In a press release, Intego states that a number of apps and screen savers distributed through sites like MacUpdate, VersionTracker, and Softpedia are installing a little more software than users bargain for; Apple's Mac OS X Downloads site also contained entries for some of the apps, though the download links appear to now be inactive. The spyware in question is called OSX/OpinionSpy and it's a variant of Windows spyware that has existed since 2008.