So I can't get Grub to load.
The computer POSTs as normal, then tries to boot from the USB. I get the error message. Computer won't move from there unless you press a key.
I've also tried version 13.04.
I've been in the BIOS looking for USB settings that might be interfering, but have found nothing.
Running an AMD FX-4100 processor in this board: GIGABYTE GA-78LMT-USB3 AM3+ AMD 760G HDMI USB 3.0 Micro ATX AMD Motherboard.
The USB bootstick was created from within 32-bit Ubuntu 12.04, which runs normally on my computer. I've used multiple USB ports, including the USB 3.0 and 2.0 ports.