From the previous post
"Also, if you do this, you have to install Windows 7 first. This sets up the BIOS emulator. If you install 8 first, it might not work due to EFI."
Woe...If you install 8 first? NOOOOOOOOOOO, avoid 8, it is horrible. Install 7 first, then if you need to install something newer go with Win 10. Avoid 8 like the plague.