The fact that you might not WANT Windows 10, or that you have stuff that isn’t ready of Windows 10. (What, you have something from a company other than Microsoft?) you are going to get it anyway.
Fortunately, there is a way to stop Windows 10. The Get Windows 10 Control Panel, the GWX Control Panel. Ultimate Outsider: GWX Control Panel 1.6 Introduces Monitor Mode and More
You can get a rundown on the product from Security Now. (A This Week in Tech podcast). The December 8th edition has the info. The relative portion is at 18 minutes.
You can download the GWX Control Panel at the Ultimate Outsider. (As Steve Gibson says on the SN podcast, throw the guy a buck or 2 via his PayPal link.)
I have been threatening to dump windows in favor of Linux for some time. (You buy a new computer and it comes with Windows…) But MS is BEYOND annoying. And Windows 10 is probably the biggest bit of spyware I have seen in some time. And the new GNU graphical interfaces look a lot like Windows or a Mac. And Linux is a lot more efficient, and all I do is use the internet, and LibreOffice. Well, and a few other things I can run under Linux.