David Auerbach discusses some Windows 10 privacy settings and their implications.
"Finally, we will access, disclose and preserve personal data, including your content (such as the content of your emails, other private communications or files in private folders), when we have a good faith belief that doing so is necessary."
"In other words, Microsoft won't treat your local data with any more privacy than it treats your data on its servers and may upload your local data to its servers arbitrarily"
I did a quick install on a VM choosing the Express settings. When I fully deploy this on a real workstation, I will likely choose to wade through all of the individual pages, as David recommends.
Of course, losing one's privacy is nothing new - it's happening all over the place (despite Santa Ana's police force's lawsuit http://reason.com/blog/2015/08/04/suspended-cops-say-video-of-them-eating or Dads who don't like low-flying drones over their homes -http://kfor.com/2015/08/03/it-was-the-same-as-trespassing-father-shoots-down-drone-in-backyard-hovering-over-his-daughter/)
When one is using a computer, however, one should expect it - whether it be your boss or ISP. But now knowing that your software is outright doing it, knowing that these companies are complicit in giving this data to whoever asks for it, it may be to rethink that approach.