Zombie hard disk
I really must get diagnostics on my media library external USB hard disk - replacement purchased: the sick disk rattles while reading files, and sometimes just stops - file unreadable. And at this point, the remaining time (Windows 10) goes from minutes to days. Or it may be "more than one day". Eventually, an error message does appear.
Re dancing interface... I'd approve a general rule that a user interface element can't be clicked or keyed when it has only just appeared on the screen. I don't know if that could be done without rewriting the OS. Maybe with a third-party utility that spots the screen or the focus changing and then blocks inputs for a couple of seconds, beeps at you instead.