NOPE...... YOU CANNOT. Period, move along, move along. This isn't new, it's always been like that and always will. It's basically an addon key that only does that.
Could we set the Win button on Keyboard for something more usefull?
Why don't you go buy a Logitech G series keyboard that can turn it off? WHAT? You can turn it off? Yes.... The keyboard basically turns off the input for that button, but that button can only be the Windows button.