Why run the program or move the mouse when the computer chassis with sound?

I bought a computer two years, due to the recent study and computer, so use a little more, but I found that if the program is running or moving the mouse back in-house chassis when the sound is like the voice of the friction? Is not a question of what the ? How do I maintain?

Your hard disk data in the call, so the voices did not cause illness in most people's all right, that Is the voice of the hard disk spinning ~ ~ do not need maintenance.As long as the attention to the norms on the line off the hard disk that is the voice of the load, if the voices more, than in the past or on the number of large, it is estimated that there are hard issues, but some general brand The voice on the hard disk load freshman can tell you is that Hitachi's hard drive ~! He did ~!