Problem with installing windows 10

[poglavnik77]

So here is the problem.
My friend bought this laptop asus x541-na and ut has linux on it but he wants windows 10.So i want to install it on his laptop but when i want to set booting priority to usb(i have win 10 on usb) i cant.I made it bootable and tested it on my pc and its working.I read somewhere that i need to disable secure boot but i cant.I can only disable secure boot control and secure boot stays active.And i also read that i need to enable CSM Mode but i cant find it anywhere in bios.
Please help guys!
Thank you.

 

[Colif]

According to your manual - see here: http://dlcdnet.asus.com/pub/ASUS/nb/X541UAK/0409_E11966_X441_X541_V2_A.pdf - CSM is on the boot tab (look on page 68). You might want to turn off Fast Boot as well as it might set laptop to ignore USB on boot