Hi!,My computer is starting to make weird noise, like knocking noise. 1st i thought that it comes from outside but then I realized that it comes from my COMPUTER! .I heard the noise 1st time today when I launched game. Before the noise, I opened case and removed video-card and cleaned all that dust from there. When the noise comes , it will do it like 5 sec then hole computer turns off . Can it be dead hard disk? Does the cleaning my computer can do something about this situation? I am from Finland so my english can be bad.