So the geniuses at MS must think were willing to pay for w10 now, because every time they do security updates they are going to install the "get w10" pop-up box! So……..
I have w7 and here is what I do:
click start
in box at bottom left, type: view installed updates
press enter on keyboard
takes a minute for all the updates to load, find "K3035583"
right click on it and click uninstall