2015-01-28, 15:40
Matt, just a useful tip for the Wiki. I've found plugging in a Logitech Unifying USB Receiver that came with my wireless mouse causes a standard USB keyboard plugged in at the same time to not work at the boot pompt. Removed the Unifying USB receiver caused the USB keyboard to work again. This took me some time to find a solution as I thought all my USB flash drives weren't compatible!