Dust can get into everything inside a computer. It causes components like fans to not operate properly, which in turn can overheat your processor and destroy a computer. It is good practice to clean out any dust located inside your computer every few months to make sure there is no heavy build up. You can buy cans of air at our shop or even take a small air compressor and blow it out. You can also bring in your computer tower to our shop and we can clean it out for you for a minimal bench fee. One thing to make sure of is to try and hold the fans from spinning out of control, you can over spin the fans and make them work improperly from cleaning them.