You will need
  • - Phillips screwdriver
  • - soft brush
  • vacuum cleaner with adjustable suction power
Turn off the computer, unplug the power cord from the AC outlet. Using a screwdriver, remove the screws that hold the side wall of the system unit. Usually the screws are located on the rear panel of the computer.
Put the system unit on its side. Put on a vacuum cleaner plastic nozzle. Turn the vacuum cleaner on a minimal suction power and gently clean the inner surface of the system unit from dust. Try not to touch the cleaner circuit Board and located their items. Even though it's plastic, not metal, but still you may accidentally displace some capacitor or relay on the Board.
For greater cleanliness, you can wipe the surface with an alcohol pad. Wool is better not to use because it leaves fibers if you accidentally clings to elements of the boards. Now that you have removed dust, loose on the body, you can do cleaning for case fans.
If in the system unit there are extra coolers, remove them. Typically, just vacuum them enough. Take the coolers to the bathroom and clean them with a brush, shaking off the dust in the sink.
In the same way clean the cooler on the graphics card. Remove the video card if you have it installed in a separate fee and are not integrated into the motherboard. Brush dust off of the blades of the cooler outside. Don't forget to brush between the fins of the radiator. Remove the cooler with the cooler of the video card is not worth it. At the end of the cleaning blow the radiator through for yourself or by using the function of blowing dust on the vacuum cleaner. Clean off the dust with a vacuum cleaner, brush or alcohol wipe.
The cooler on the motherboard harder to clean. To remove it, if you have no thermal paste to the CPU. So again, clean brush and a vacuum cleaner, carefully follow the flying dust, it is better to catch them with a vacuum cleaner. See, that dust is not settled in asiamah for devices on the motherboard. This may lead to a short circuit, so after cleaning the cooler on the motherboard again go all across the Board with a vacuum cleaner, paying special attention to the connectors.
If you have thermal grease, you can remove the CPU together with heatsink and clean them more thoroughly and carefully. Then use alcohol wipes to clean the stone surface of the CPU and the back of the radiator from the remnants of the dried up thermal paste. Apply new thermal grease on the stone evenly and install the CPU heatsink and CPU in place.
Insert the card and secure it with a screw. Set back an additional cooler if they were. Close the system unit.