Hi - Perhaps you've solved problem by now. Thought I'd checkout your problem because your mobo is quite new. I also have Windows 7 graphics compatibility problem with my Dell PC that's 2 years older than yours. Have been onto Intel site and it seems your mobo is Crossfire compatible so you can fit a graphics card that will cope with Windows 7 requirements. In fact, if you're interested I have a surplus EAH4350 card that I can't use!
Windows 10 Home vs Windows 10 Pro comparison: Here are the extra features you get in the Pro version