i have exactly the sma eproblem on my other pc lol

i have to click on the little arrow next to it and choose shutdown

ive even changed controls for that button to shutdown but it doesnt do it lol

but you can try it

go into control panel i think , and on the leeft it says

what would you like the red button to do i think, and chose shutdown

but you will have to do it the way i just said i bet