I am trying to boot into Linux from windows 10, and I have created a bootable usb flash drive. I can access the "boot menu" on my gigabyte mother board by pressing f12 during startup, but even though I am prompted to use the DEL key to enter the BIOS, that key won't perform that function. I am very confused because the keyboard works for f12, but it doesn't even seem to recognized when I press DEL.