after several tries, i used USB linux loader and tried to install kxstudio on my Win 8 laptop.
i tried with the 64x version and now i can't install it on my laptop.
using USB linux loader, i managed to run the efi boot files (in 64x boot it tells me it is incompatible) when i ran the normal boot.efi, few windows came up:


i'm new of linux and I got stuck in the Grub windows with:
grub>
and now I don't know how to move.