New
#11
powercfg -wake_armed
after that disarm all devices listed, usually its mouse and keyboard
powercfg -DEVICEDISABLEWAKE devicename
personally i soldered a extension wire to the powerbutton on the motherboard and put a little pushbutton on my desk.
I've set powerbutton to Sleep. So when i leave my desk i push the button, after i return i push it again.