Scientists have thought that magmas that form new crust at fast-spreading ridges rise up from the depths, quickly crystallize, and then push away from the ridge to form new ocean floor.
To stop a computer from overheating never keep a cloth or something else on the CPU or monitor. Also use the save energy option from properties so as to switch off the monitor when not in use. This will always help in keeping the computer cool and not overheating it.
If you are not using a dual-core processor, for example: Pentium 4. Go and get a higher GHZ pentium 4 chip. Overclocking on a laptop can cause a lot of heat. Overclocking is increasing the rated speed of a hardware. For example: From a 3Ghz processor to 4.2GHz.