Because it's an American product, versus your foreign conceived and maintained Linux. That is the point of this thread, but you seem to prefer defending Communist China for some reason.
I said that it would be stupid for China to use software that they couldn't be sure was secure, the same as it would be stupid for the U.S. of A to do the same. Not sure how you get supporting China out of that, I'm supporting common sense. You must have cash riding on M$.
I have told you number of times that Linux is a Western World creation. Linux was written by Europeans and Americans, not the Chinese, not the Soviets, not the Cubans. Sheesh! The things some people will say out of fear and hatred.