One day I was doing my usual buisness on my computer and then suddenly, it went into some sort of a rainbow effect and so I got scared and turned it off with the power button. And then I turn it on back on, and I see a flash of many different colored pixels and lines, but my computer starts up normally. I then run a random program (wow) and I suddenly get the "frequency out of range" message on a blank black screen, and then a blue screen! This happens every time I turn it on, and I can't seem to get it to work properly. I'm using an identical Vista to provide additional computer information.