Question: I've installed all drivers for BayTrail models from ASRock download zone, but there's still one device show "!" in Device Manger. What should I do?.(7/1/2014) Answer: This issue is related to the requirement of Intel Trusted Execution Engine. Please kindly install Windows Update KB2685811 then install Intel Trusted Execution Engine again.
KB2685811 download Link: http://www.microsoft.com/en-us/download/details.aspx?id=38423