It's a complicated matter, revealing what data is collected, against security of the company or even a nation.
The only company being left out of the NSA discussion is Microsoft.
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Not anymore:
http://scforum.info/index.php/topic,8448.msg21794.html#msg21794
Really?
Need evidence for this. Install a Windows 8.1 one of the home edition (I suppose it also is on the pro version if you not set up the computer to a AD-infrastructure). And see what is the default setup that about 98% of the users use.
How do you get the SkyDrive to work seamlessly whit out any fix if you don't use the Live account? just some questions to get answered.
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Now, I'm pretty sure that You have right about this...