Be sure that your computer is turned off before starting this procedure
. One way to prevent failure or erratic behavior is to do a periodic maintenance. This normally includes removing the cover from computers and using canned air to blow out all fans. Be sure to blow out the processor fan and fins of its heat sink. The surface of the mother board and other components should be blown off also. You should also blow out the fan of the power supply. If the power supply fails you will not have any power to any part of your computer. This could be embarrassing if you have a critical job to do on the computer.