My HP pavilion x 360 was updating and I accidentallly turned it off . When I try to turn on the laptop it says the selected bo

Feb 14, 2018
Hi my HP Pavilion x 360 laptop Hewlett-Packard was updating and I accidentally turned it off and now when I try turning it on it says the selected boot device failed. I press to continue but it only turns off the laptop . Someone please help what can I do ? I need to do homework .