can't install windows 8.1 on asus x751m freedos operating

Hello I got a new ASUS x751M with a freedos and I tried to install win 8.1 the ordinary way (burnd a dvd). Changed boot priority to the dvd rom also enabled launch CSM. Also when I tried to launch efi shell it just said not found. Now what am I missing? can anybody help???

Some ASUS are pre-set to boot UEFI & Legacy.

I know i should boot in uefi but there is only csm option

theog said:

Some ASUS are pre-set to boot UEFI & Legacy.

Click to expand...

Some setting for CSM.