I'm attempting to reconfigure a spare computer I have on hand to sell to a coworker with a fresh installation of Windows 8.1, but I'm running into a problem. The machine in question is running Linux Mint currently. Yet every time I go into the BIOS, it utterly refuses to let me change the boot order so that I can install Windows from a USB key. No matter what I try, the BIOS always tells me, when I try to change the boot order, that I have not changed anything in the BIOS! The mobo is this side of brand new, as well. What am I doing wrong, here, and if worse comes to worse I may just have to bite the bullet and get a new SSD to do a total fresh install with, but I'd like to avoid that. What do I need to do, here, to be able to make this thing boot from USB?