Do nothing in the BIOS, I mean set your 1, 2, 3 boot order back to what you normally use (Like HDD, nothing, nothing)
Then in Integrated Peripherals be sure you have Legacu USB and USB Storage enabled, then leave the USB Stick connected and reboot.
On reboot hit F12 at startup for the boot menu, on the boot menu choose HDD+ and then on the next screen choose your USB Stick by name