Hi everyone. My first time here. I just need help with my PC. I have a Dell Dimesion 8400. It was working fine untill a few weeks ago when it keeps turning off. I log on and everything and the all these warning messages pop up and it restarts. At the moment I am logged in on safe mode with networking. But its really annoying coz i cant use msn or listen to music. Sometimes it works fine but that is very rare. First I thought it was one of the fans in the PC, but there both spinning. I even vacumed the inside of the computer but no luck!!! Someone please help!!