This is getting ridiculous. They started these updates many months ago (not quite this underhanded) but if a user has made it this long without "upgrading" to Windows 10 they do not want Windows 10. Sneaking something in with a "Security Update" isn't going to convince them to "upgrade" it is just going to piss them off.
I use Windows 7 Enterprise, but it is not connected to a domain. I disabled Internet Explorer through Programs and Features a long time ago. This update did not hit me probably for that reason alone. I keep Chrome and Firefox installed instead.
Due to all the Windows 10 spam I changed Windows Updates to notify and let me select what updates to install months ago. Since then I always skim the updates and hide and do not install any that are Windows 10 related, which takes some effort. Now I have to start reading all the fine print on each security update to make sure they are not sneaking it in that way.
Seriously if people have not upgraded they do not want to. It is not like they do not know about it, they flat out do not want it. I know what I would gain and loose by installing it and I have chosen to stick with Windows 7 for many reasons. I have not use for DX12 and future processor support can be addressed when I there is something to support, otherwise the other 'improvements' are very subjective, something I have no interest in or something I flat out do not want. I am happy with with what I have and the product is still in support, it is not like I am still running XP. If I was running Windows 8(.1) I would be much more likely to consider 10 or better yet a 'downgrade' to Windows 7.