As document DOC-40159 points out, HII may not always inject these drivers. I had the issue of the device Id (IUSB3\ROOT_HUB30&VID_8086&PID_9D2F&REV_0021&SID_80FA103C) not being found in my driver repository at all. What I eventually did was ignore looking for the "device Id" and instead typed iusb3hub in the search field. Then I was presented with several iusb3hub.inf's tracing back to the driver repository. I then looked for the driver folder location that I knew was there for that model, pointed to it and assigned the driver. Once I performed this action, my USB3 driver was injected during HII as well the any other USB drivers it needed.