Hi i'm a bit new to building PC's (this is my first build) so far everything's going ok until I tried to boot it. I'm trying to put windows 10 64-bit operating system via USB. However whenever I try and boot the USB stick the screen is black with a flashing underscore. I don't know what to do from here hence asking the community, My specs are: ASUS M5A78L-M USB 3 motherboard, AMD FX 6300 processor, ATX 500W PS, gigabite GTX 960. Thanks (sorry if its an easy fix and im just being an idiot)