I'm trying to install Windows 8.1 from a CD i bought on my iMac Mid-2014 El Capitan OS X via Bootcamp. I also later want to upgrade to Windows 10. I went through the Bootcamp Assistant partition setup easily but when Windows 8.1 starts up and I get to the "Where do you want to install Windows?" screen, there are no options whatsoever. I've included a photo of the problem. I later was suggested to restore my Mac. I restored it completely and unfortunately it didn't help. What should I do? Your help will be very much appreciated. Thanks and Happy Halloween.