"A: Hover the mouse where the Start menu used to be. Click settings. Way over on the other side of the screen, click Power. Click Shutdown."
aah now i get it, hovering didn't work for me, but by touching the very edge of the screen right in the lower left corner the 'start' menu appears and there you can click settings and do power down. this also works in desktop mode. [however clicking the start button in desktop will bring up the start screen]
quoting is seriously broken in ie10 btw