My computer cannot turn on. Every time I turn it on, it runs to show the desktop; then it automatically restarts again. But if I try to push the button to turn it off, it won't work; it will keep running till the desktop comes out, then restarts again. It keeps asking me to send the problem report, I send it several times, but I still cannot turn on my computer. What should I do about it? Please help. Thanks a million.