Sometimes you might come across an overheated laptop. Most people go into panic mode and go to the nearest repair shop. Before this, its prudent to check whether dust is responsible for blockage of the fan intake. This insidious problem can also be caused by fan malfunction (on starting, the computer may pop an error message after starting). In the former case, cleaning with compressed air should suffice. Otherwise, you might be headed to the repair shop if the heating is being caused by breakage of screws connecting the heatsink to the CPU.