Hey there…
i want you to know how the installation works, because i searched over and over again on google and found everything but nothing helpful… so here is my advice 
If you have for ex. 1 SSD and 1 SATA
on SSD you have preinstalled Windows 10
and you would like to have Kali Linux on SATA
Just do it like that
-
Download Rufus
-
Download Kali Linux
-
Set it up by DD not ISO - so you dont have troubles with CD Rom mount
- Very important
Got to bios (for me is F12) -
if you have a UEFI mode BIOS with Windows 10
- secure mode disabled
- …rom disabled
- add file to boot in bios … and select /USB/boot/…x64.efi
- save
- put it on the first above windows bootloader
- save and exit
- restart pc/laptop
- now you can follow the installation without troubles
if you have questions - ask me - iam always there for you and comment asap.