I was working on my computer that i suddenly noticed that my computer just switched off suddenly. So what i did is to restart the computer. So again it started properly for some time and again it switched off. So i opened the cabinet and started it again, during doing this my external cord just blewed away. I tried again with the another extension cord again it blewed away. So where does the problem lie in the existing system. What is causing the blewing of the external cord. Please suggest me something.