Probably a simple fix, currently lacking the resources to research this myself so unfortunately I'm forced to intrude here with my question as a last resort..

Succinct topic title describes the error.

Method:

1) Download Kali .iso file.
2) Use UNetbootin to create a HDD install option from the .iso.
3) Restart.
4) Select UNetbootin OS option at boot menu.
5) Told \ubnldr.mbr file is missing, code 0xC000007B.. No Kali installation.

I suspect it has something to do with interplay between GRUB and MBR but I can't puzzle it out. With Windows launched I can locate the file in question in C:\ along with the Kali folders and am therefore unsure why it's not being recognized in the boot menu. I've searched pages upon pages of Google results but nothing seem to clue in to my specific problem, so hopefully some response here will shed some light for future users who run into the same issue. I seem to have all the data I need to launch the installation, so how do I point the boot menu to access this file?

Kindly forgive my ignorance. Any help would be appreciated. If someone can fix this I'll send you a picture of a cupcake or something.