I have an Acer 5 laptop computer that I have had for several years, and previously I "cleaned" the inside of the computer with compressed air sprayed through the ventilation ports. But, I realized that this method was probably just spreading the dust around the inside of the computer and could cause problems. I would like to know how I can clean the dust out from the inside of my computer. I "Googled" this question, and saw that the back of the computer can be removed and then the compressed air could be sprayed around the inside of the computer, but I am hesitant to try to remove the back of the computer for fear of damaging a component of the computer. Also, I know that sometimes it is difficult to remove the back of a computer and I don't want to force the back of the computer off is it is not removed easily. Can anyone tell me how to clean the dust and not cause any damage. Any and all suggestions are gratefully welcome.