I believe I'm doing everything correctly, but I must be missing something. I have a Kingston DataTraveler 3.0 8gb flash drive formatted in FAT32 to boot Kali Linux (with Linux Live USB Creator). I plug the flash drive into my computer while it's on (with Windows 7) and it senses the flash drive, but when I reboot and go into my boot settings there's no option to boot from my flash drive. I have a Dell Inspiron 15R 7520 with a very lightweight version of Windows Ultimate (without extra drivers or software) installed on it. Since I installed that I've got most of my old drivers back but there's still some missing things I don't know how to reinstall, and I think that may have to do with this issue. For example, I could mount an ISO image to my drive before I replaced Windows 7 Professional with Windows 7 Ultimate.
Since I don't have enough reputation points; here's a link to several images of me searching through menu's and sub-menu's for a USB boot option (the last picture's of my boot settings/menu, which is separate from my BIOS): https://imgur.com/a/RWu0x
Do you guys have any suggestions?