The H9 control works fine on my Windows 7 (similar specs to yours); the only thing is that the Listen option in the Store does not work. Everything is updated and connected correctly, and Jerome from Customer Service (kudos to Jerome) went through it with me, but it never worked. The simple work-around is to use the Try option which works perfectly.
I have not used the Midi, but the USB connection is solid with the H9 Control panel.
