Problem after installing

Hello everyone,
I just buying a new laptop hp 640g1 with hdd 320g.
After installing manjaro kde it works well but when i shutdown the laptop stop for 15 seconds and open again i tried install windows and works well its not open after shutdown and another problems when install manjaro xfce it gives me that no os and 3f0 .
*the problem of shutdown its happen in all linux distros.

Can you check the Bios settings of your laptop ?

Punctuation please.

Boot settings

You should change the following settings:

Change Boot mode to UEFI Native
disable Fast Boot
disable PXE Boot