Hi guys! I have a little problem when the computer is first turned on for the day. I shutdown the computer every night and turn it on the next day. When I push the button to turn the PC on, I can hear a loud sound like a racing car, you can hear the RPM's raising from low to high. After I log on to my account, I give the front end of the tower a little blow with my hand and the noise stops and the PC is quiet again (except for the CPU fan). I have no other fans but the CPU fan and the Power Supply fan in this case. The CPU fan has been replaced and seems to be running fine. Before, it was running too low in RPM's. What else could it be? Help! It drives me crazy every time I turn the thing on.