USB hub/ports built into (DisplayPort) monitor?
Can you right-click on the "missing" device and get Windows to automatically download/install driver?
If you methodically plug a USB device (extra keyboard, mouse, flash stick, anything) into each and every possible USB port then you should encounter one which prompts Windows to download/install the "missing" driver(s).
The
motherboard manual briefly mentions "The USB 3.0 Module is purchased separately", I don't have any clue what this refers to.
It also says KeyBot II imposes some limits on specific USB ports. Probably not relevant.
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[/Korth]