why my fedora 23 hangs when rebooting or shutting down?

edit

Hello people,

yesterday i installed fedora 23 in dual-boot with windows 8.1 and every time i try to shut it down or reboot, the screen goes black but it remains lit up and the WI-fi bottom still lit up as well.My computer is a HP 14 r230la Booting on UEFI.

Please may anyone help me?.