Most computers come with enough cooling systems and plenty of fans, but there are steps that you can take to ensure heat does not become a problem.
The first step is to clean the inside of the computer. This is done by getting rid of dust built up in your computer and keep in clean. Internal dust built up over time can lead to heating problems. Dust is an insulator and when you crack open the case of your computer. If the case of the computer is filled with dust, you are looking at a reduced life span. The dust can raises the temperature of components across the board. It is important to check the physical location of your computer. If the computer centers is near a window with hot air blowing in, it is not good for your computer. Ideally, the flow of air where fans should be steady and adequate with room for computer to breathe. If your computer overheat, shut it down and let it cool down. You can then plan course of action that involves doing some cleaning if necessary or upgrading your BIOS by checking your motherboard's manual. You can also do a detail cleaning of your cooling upgrades if necessary.
If your computer is clean, ...
This solution discusses options available to cool computing systems.