Updated to the 126.96.36.199b hoping it would correct the 'No Acceleration" bug with CloneBD but it did not. nVidia: 391.01 | GeForce GTX 570. It has to be a CloneBD issue as my other programs (Sony Vegas Pro and my TMPGEnc programs are using CUDA). The only explanation I can think of as to why CloneBD is not activating CUDA is I have 2 GeForce GTX 570 cards (not SLI), but I cannot see why that could cause an issue as all the other necessary drivers are up-to-date. Any thoughts from the forum would be most appreciated.