Yes that is why I think it is video card a GTX 260 I set it from Stock 576 clock to 650 using Riva Tuner so I dialed it back to 625, I will see what happens. I went 3 days with out a problem until I played with Riva Tuner, so I can pretty well establish this was caused by Overclocking Video card
I thnk you for your quick reply