mehn...i have the same issue!, i was using kali 2.0, usually after windows update grub hides, i'll have to use boot repair disk to bring grub back. unfortunately after the anniversary update or whateva they call that ****, it didnt work anymore so i decided to get kali 2016 rolling. but still doesnt boot. according to what i read online kali doesnt have EFI support, i tried the examples i saw online of creating the efi folder. still didnt work, please if u know any better method that works i'll appreciate.
using a Lenovo ideapad 100.