I have 3 drives on my computer;

Drive A: 225 GB SSD
Drive B: 2 TB HDD
Drive C: 1 TB HDD

Now;

Dirve A has Windows 7 installed in it - and pictures and such.
Drive B is a storage drive - videos, my steam library etc.
Drive C has Kali Linux installed on it.

IF I recall correctly; I set the GRUB loader to be installed on Drive C. I was installing in UEFI mode, but when I came to the GRUB stage, I exited UEFI mode due to the installer recommending I do this.
When I start my computer, my bios flashes like normal, then I am brought to a selection screen that asks me what I want to do, my options are along the lines of;

Kali Linux (Launch)
Advanced Options
Some Repair tool that prints an error as soon as I run it.

Launching into Kali, I can see my other two drives and access the files on BOTH drives meaning that the files are still there. I can see my windows files also on drive A.
Anyone have an idea of whats going on here? Please let me know ASAP.