Last step to my new pc build and what do u know when i go to install windows 7 i get :A required cd/dvd device driver is missing error. Ive looked at all kinds of threads with the same issue and none of the solutions work for me which is honestly frustrating. Ive tried usb and an official windows dvd and still have the problem. My mother board is asus z170E and cpu is i5 6600k im downloading a 64 bit version. I need a working solution.