China has blacklisted Microsoft Windows - 90% are likely illegal copies anyway

From CNN online:

The prohibition doesn't affect the Chinese public -- only government computers...

Windows operating systems are huge in China, and now that Microsoft has ended support for Windows XP, the Chinese government finds itself in a tough spot.

Nearly three-quarters of Chinese PCs are running XP. That leaves tens of millions of computers there at risk of bugs and malware...

Microsoft is also fighting an ongoing piracy battle in China.

The company estimates 90% of Chinese PCs are running illegal copies of Windows software.
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Link: http://money.cnn.com/2014/05/20/technology/china-windows-8/index.html