This reminds me of the best "feature" that windows 95 had to me as a kid. If you clicked the start menu, then hit alt + -, you'd get the standard menu for playing with a window. Minimize, Maximize, Move (greyed out), and a few others. Importantly though was that Close was an option. Clicking it would remove the start button. This lead to lots of fun playing with computers in stores at the time, closing the start buttons on them all.
I never stumbled into that one. What I do remember from Windows 95b through 7 is if the keyboard focus was on the taskbar and you pressed Alt+F4, it brought up the Shutdown/Restart/Logoff dialog. That made it possible to cleanly shutdown the computer blindly from the keyboard. Win,Esc,Alt+F4,R,Enter
https://devblogs.microsoft.com/oldnewthing/20120213-00/?p=83...
This was before the advent of "windows keyboards" and the menu key on them.
EDIT changed link to a better one