Microsoft Corp (MSFT)

[Lowjack]

“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”

All of which means Windows 10 has the right to install whatever it wants on your system without notice and to read and disclose all your personal information and files when it sees fit – even with files you place in private folders.