content: You might be interested in this little snippet of fine print from win10. They will break in to your machine, copy anything they like, share it with whoever they want, for any reason that sounds good. That's an instant deal breaker for me.  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 to protect our customers or enforce the terms governing the use of the services.