Many people don’t think about the hidden danger of heat to their computers, or how easy computer overheating is to prevent.

A lot of people don’t think about the effects of heat on their personal computer or laptop. The effects of overheating may be subtle, such as causing the computer to run slower or shortening the expected lifespan of the components; or it can be so devastating as to cause a fire. The most common side effect of overheating is having programs freeze or the computer shutting down sporadically.

How Computers Handle Heat
Computer heat is most efficiently handled by fans. The main fan is usually in the back and blows out. In addition there’s usually a heat sink — cooled by another fan or by a coolant system — over the CPU to prevent the processor from overheating. Some computers have additional fans to encourage airflow and help cool off high-heat components, but this varies from computer to computer.

The power supply can cause overheating if it is not properly installed in the case; if the vents aren’t positioned correctly the hot air can end up in the wrong place. The amount of free space inside the computer also matters; if all the hot components are close together, or if the placements of cords/components is impeding airflow, it can cause more heat problems.

What Can Cause Computer Overheating

There are several things that can cause a computer to overheat.

•Dust inside the computer and around the fans acts as an insulator, causing overheating.
•Running the computer in a hot environment also causes overheating.
•Running a lot of unnecessary programs can aid overheating.
•If the fans are obstructed by walls or drapes it can impede airflow.
•If the computer is being overclocked it can cause the components to overheat.
•Leaving the computer on for extended periods of time can cause overheating.
•Having the computer next to a hot device (a hot vent, other machinery, etc) can heat the computer.

How to Prevent Computer Overheating
By looking at the causes of overheating it’s often easy to diagnose and fix the problem that causes it. It’s important to resist the temptation to leave the computer open while running; the typical computer case is designed to conduct airflow, and leaving the computer open may make the overheating worse.
Simple Ways to Increase the Life of Any Computer’s Parts

The easiest way to prevent the computer from overheating is to clean it out. Most retail stores carry compressed air in their computer aisles, and it’s the easiest way to clean dust out of a dirty computer. A vacuum cleaner can also be used to suck the dust out of fans and ports along the outside of the computer. For more in-depth cleaning instructions, Lifehacker offers a step-by-step guide to computer cleaning: Geek to Live: Evacuate PC Dust Bunnies

Keeping the computer off the floor can help keep excess dust and dirt from mucking up the inside of the computer and fans. Also, putting additional fans in the computer can help improve ventilation. Many cases have specific spots for installing these extra fans; make sure that they blow the hot air out.
Don’t keep the computer too close to the wall, or near anything that keeps the hot air around the case rather than dissipating. It’s also helpful to make sure that the computer is free of debris — keeping stuff on top of the computer can insulate the computer as well.

When Nothing Else Works
When nothing else seems to be fixing the problem it may be hardware related: a broken fan or heat sink can cause major heating issues. If there’s a warranty in effect, contacting the manufacturer about any heat problems may be the easiest solution.

An overheated computer can cause any multitude of trouble. Knowing what can cause the overheating is most of the battle, and even the most novice computer user can get inside to clean the parts and check for broken fans.