Turn off automatically for first time

[life24]

Hi,
I push the 'turn on' button and show windows 8 logo and turn off laptop automatically.
Again i push the 'turn on' button and laptop turn on well and start windows normally.
Why for first turn off laptop automatically and i force press turn on button again? (asus X550L)

 

[Burpo]

Could have just been an unfinished Windows update..