Privacy is a natural right.
“I don’t care about privacy because I have nothing to hide” is similar to saying “I don’t care about free speech because I have nothing to say”.
Privacy and Secrecy are different. Secrecy ensures that nobody knows the content that are secret (example: Merger plans of a company, before releasing it). Whereas, privacy ensures that certain contents are not made available to the public, even though the public might know certain aspects of the content (example: Social Security number of a person, his marital status, place of birth, number of children, etc).
If you install Windows 10 Home on its default settings, the operating system sends data about your internet browser history and your location, tracks every word you type on the keyboard using a keylogger and notes every single request and question you ask of the personal assistant Cortana – in part to serve targeted advertisements to you in the Start Menu.
Microsoft have even rolled out back ports of the tracking “services” to Windows 8 and Windows 7.
Disable Microsoft Personal Data Collection Telemetry Services
To disable the collection of Personal Data on your computer, install the Anti-Beacon-Tool by Spybot.