Thank you for contacting the Intel® Communities.
I would like to know if you are able to access the BIOS.
If the asnwer is yes, please go to Advanced>Devices>USB and make sure they are activated (Under USB Ports).
A BIOS update could also help with the issue you are having.
Yes I'm able to access the BIOS with keyboard/mice. I have both upgraded and downgraded BIOS-version to test different versions, currently I'm on 0352 (latest).
Under Advanced>Devices>USB I have all usb ports enabled.
I tried rolling back the windows installation to previous 8.1 but the problem persists, right after BIOS bootscreen all usbports stop working.
Have you enable USB Optimization in the bios?
If you enable USB Optimization, all USB devices will be unavailable until after the operating system boots