What safety precaution should I take regarding heat and ventilation when using the laptop?

Do not place the computer directly on your lap or obstruct the computer air vents, as this can cause heat-related injuries or overheating. Use the computer only on a hard, flat surface, and do not allow pillows, rugs, clothing, or other soft surfaces to block airflow. Also, do not allow the AC adapter to contact the skin or a soft surface during operation. (Page 5)