(Pardon me with my poor english) My notebook is an Asus X550DP that came with Windows 8. I`m trying to make a dualboot with Freya 0.3.2 64bits, but every time I try to install I get this error: "'grub-install /dev/sda' failed. This is a fatal error" I`m booting from a flash-drive in UEFI mode. I left 60Gb for Freya, of which 20Gb is ext4 /, 36Gb is ext4 /home and 4Gb is a swap space. What should I do?