Below are several articles about what you agree to when upgrading to Windows 10. Most of the settings can be turned off but are not always easy to find and how can you turn them off when you don't know about them. Microsoft's privacy and security policies add up to 45 pages. I'm sure everyone has read them. This version collects more of your private information and exerts more control over your devices than ever before. Educate yourself and think twice before committing.
Windows 10: Here Are The Privacy Issues You Should Know About
Windows 10: A Potential Privacy Mess, and Worse
The Real Price of Windows 10 is your Privacy
Windows 10's New Feature Steals Your Internet Bandwidth
What is the "Get Windows 10" Tray Item and How Do You Remove It?