Windows is not a secure nor a private operating system platform.
I couldn't recommend it to anyone concerned about the security of their computing platform, or, the confidentiality of their personal private information (PPI).
It cannot be hardened or made secure so long as it is connected to the public Internet.
If you use it, you are unwittingly transmitting PPI, location data, and system data to Microsoft, even if you attempt to harden the o/s through enabling its privacy settings.
Curious about what Windows collects about you? Here's an analysis.
Microsoft's operating system is constantly susceptible to zero-day flaws and attacks; famously, a Russian-created zero-day attack mounted by Russian intelligence services were used to attack the DNC.
If you're concerned about security or privacy, one cannot honestly look at Microsoft's offerings and consider them a serious option.