My Miix 2 8 must use a device that does not have a signed driver. By using the advanced boot options 7, I successfully installed the driver. I must use this option 7 each and every time, or the driver will still be disabled after a reboot. The problem is: the Miix does not have a keyboard, I cannot select 7 when I don't have an USB keyboard with me.
After some try and error, the fix is actually very simple: disable secure boot. In advanced boot options, select UEFI Firmware Settings, this will reboot into the BIOS:
In the BIOS, turn off the Secure Boot. From now on, the unsigned driver won't be disable after a reboot.
Now Windows complains about incorrect SecureBoot, but I don't worry about it.