So the “nasty trick” is that clicking the "X" to close now keeps the Windows upgrade scheduled instead of skipping it or cancelling it. That’s a stupid thing f

So the “nasty trick” is that clicking the "X" to close now keeps the Windows upgrade scheduled instead of skipping it or cancelling it. That’s a stupid thing for Microsoft to do but it also shows why the "X" doesn’t even belong in a window when there are buttons. (As far as I can tell, only the Mac platform gets this right: Mac buttons appear alone, without a close-widget.) If the "X" is also there, it is at best confusing and at worst buggy. I’ve maintained apps where the developer forgot to even “wire up” the "X" button, or where the default behavior created a 3rd untested outcome. And if the button is mapped at all, the choice is arbitrary: in some messages it means “OK”, in others it means “Cancel”, and in others it might as well mean “Nuke Hard Drive with no Undo”.