I'm trying to install windows 10 after a reformat but running into a problem with my boot order. Instead of beginning the install from the usb I made or from a disk I always get the message that there is no OS installed and to connect a drive with an OS. I can get to the boot order in the bios but my choices there don't seem to matter or take effect. No matter what I choose it is always stuck on HD first. Is there any way around this? or to force my bios to boot from USB or disk drive?