What are the operating guidelines to prevent the computer from overheating?

Keep the computer away from excessive moisture, direct sunlight, and extremes of heat and cold, and operate it on a sturdy, level surface. Leave a 10.2-cm (4-inch) clearance on all vented sides of the computer and above the monitor to permit required airflow. Never operate the computer with the cover or side panel removed, and occasionally clean the air vents to prevent lint and dust from blocking airflow. (Page 12)