irql not less or equal

I had to resort to my old 2 GTX 560 Ti's as my GTX 780 has failed and must be returned. At first, Sli had not worked, but after several updates and installations on my Asus P8Z77-V motherboard fixed the problem, but only temporarily. I come back the next day to realize that Sli had stopped...

I have recently had a new hard drive installed and they cloned my old to the new. they also changed the display driver and I now don't have graphic acceleration. The newest driver will not work. It stretches the display and still no graphic acceleration. What could be causing this? I was...