From what I see, it schedules the upgrade, and you have to opt out by going into some other settings to cancel.
It's not that the "X" activates the upgrade - at that point, it's too late.
Still, it's very shady not to give users an obvious choice on the popup, let alone not making it an "opt in" choice.
All of my machines are running Windows 10... shrugs... at this point, all the bitching is basically all about the point of the matter. Win 10 runs fine on the machines I've installed it on (several laptops, 9 or 10 desktops, some 10+ years old). Unless you have some particularly specific niche software or hardware (that can't run in Win7, therefore, not in Win10, since the drivers are mostly the same), people really shouldn't have too many complaints.
I'd be more concerned if Microsoft was pushing people to Win8 and the crappy fail that was the Metro Start Screen. Win10 dialed it back and makes more sense in the case of a desktop/mobile hybrid OS. Still, the exec who is pushing this sort of tactic needs to be fired ASAP.
True, apparently most users think this is the "we will NOW upgrade your PC" dialogue box and just close it to cancel the upgrade. But instead, this is the " We have SCHEDULED your upgrade, and here you can change some options about the schedule or start the upgrade right now" box. And closing the dialogue does nothing about the schedule.
People just seem to click away everything which is put in front of them. If they would actually READ the text, they would see that in the middle of the dialogue, it says "click HERE to change upgrade schedule or cancel scheduled upgrade": http://core0.staticworld.net/i...
But apparently reading text is too hard these days.
Disclaimer: I do not say Microsoft are right in the way they try to distribute this upgrade. But some accusations (like that they changed this dialogue to start the upgrade even though people "X it away") are just stupid. It's just a consequence of them making it a "recommended" update plus the update settings the user himself chose.