Disconnect the power cord from the computer. Remove the side panel. Use a can of air you can buy especially for this purpose, to blow out all the dust. Keep the can upright and do not turn it upside down or liquid will come out. Be very careful not to touch anything inside or static electricity from your body will destroy electronics. Touch the side of the computer metal case to discharge any static. Blow the air out of the intake on the front of the PC. Pay close attention to the power supply outlet on the rear. Be sure and blow all dust from around the motherboard.
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