Win10 wants an update. Blocks the whole screen with its window that only has an [OK] button, and dims everything around it. But, Alt+Tab did somewhat work, it didn't get the window into the foreground, but at least gave it focus. Enough to kill that thing from a task manager. Who comes up with this?
Someone, somewhere, must be thinking that completely blocking the computer of random people right now, without the choice of saving/finishing work, is acceptable.