When I am in detached/tablet mode on my new i7 and screen locks it asks you to hit Ctl-Alt-Del which is impossible without the keyboard. It says you can hit the "Windows" button, which the i7 apparently does not have. I have read forums and for older units it seems you can hold the power button down and hit the "up" volume button but that does not work either. This should not be this hard...Any advice please....Thanks!