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 vents are not kept clean and get clogged with dust and fibers, the CPU can overheat and cause crashes, malfunctions and damage. To clean it out, you'll need to open your computer's case. For cabinet, hardware cleaning you need physical efforts, not software.