Everybody knows that the basic reason for computer damage is a lot of dust in the cooling system. Dust gathers inside the computer preventing the cooling process. As a result, incorrect cooling leads to 1) the increase of circling and fan noise, 2) the shutdown of the computer because of overheat protection, 3) the swell of condensers on the video card, motherboard and power adapter, and 4) short circuit and static discharge. All this leads to computer breakdown and costing repair.