@Alex:
You do realise you will just end up blocking Windows Update and Windows Defender, potentially leading to much wider security issues than Microsoft being able to see what apps you use.
Yes, I do. Although, to be a nitpicker, the telemetry stuff is not a security concern. It's a privacy and control concern. I make the choice to have privacy (and control) in cost of security.
Microsoft is not transparent and honest about what a patch does. It's not like FreeBSD, pfSense, and Linux distros. There are numerous articles mentioning that Microsoft introduced telemetry in Windows 7 and 8 WITHOUT being clear about. Without giving users the choice.
If you use Windows, you have two enemies: the malware creators and Microsoft itself. By using Windows I accept that my computer is insecure. I mitigate the issue by using none of the bundled software (I hope that'll manage to have Skype updated, if not I'll just run it in a VM), using an anti-virus solution, relying on the firewall of my modem-router (and pfSense could very well replace that), and being religious about backups.