There are various commands associated with computer window that is:
Run (Win+R),
Windows Explorer (Win+E),
Show Desktop (Win+D),
Search (Win+F)
Locked (Win+L)
First guess; the BIOS. Second guess; the CPU.
sub-commands
ewan
window bar
A demoted menu is a list of additional commands associated with the selected command.
full menu
task pane
submenu
Ribbon
Task pane.
through keyboard only we can enter the commands into the computer.
Go to your DOS window and type help, then hit enter. It will list the commands for you with a description of what they do.