> Specifically, when prompted with a Windows 10 update, if the user chose to decline it by hitting the ‘X’ in the upper right hand corner, Microsoft interpreted that as consent to download Windows 10.
Ah, that brings back memories. Back in the DOS days, when you ran "format", it replied something like "Ready to format disk X. Press any key to continue:" (with X being the drive letter). And it really meant press any key to continue. Escape would continue. Control-C would continue. Even control-alt-delete would continue. The only way to not continue was to turn power off.