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Again... THIS IS FOR A HYBRID BOARD INSTALL - IE: BIOS/UEFI MIX....

FTR:
in the menu config of grub2win add a 'Other' OS
Edit custom code
#X is the respective partition and drives

set root=(hdX,msdosX) <----- That is a major key,...and hardly any guides if any, mention it.
linux /vmlinuz ro root=/dev/sda5 ro root=/dev/sda5 <----Yes, twice
initrd /boot/initrd.img

Save and apply...

This will successfully allow you to dual-boot Win10Ent(or any flavor) and Kali1.1 64bit without UEFI on a UEFI/BIOS hybrid board....

Might want to add this to a sticky....