I have owned and used Studio 11 for some time and it has been successful for me. However, I have recently upgraded my PC with new motherboard, Pentium i5-4430 @3.0 GHz, 16.0 Gb Ram memory and a new hard drive. Graphics and sound card remained untouched. I have had to re-install all my programs including Windows 7 SP1 which has been OK until I tried my Studio install DVD. Nothing happens at all. I get the initial autoplay then the screen asking permission to change but after that everything ceases. Task Manager shows no action. I tried downloading from Sony but exactly the same happens. I have made sure I have Quicktime 7.7.4 and DirectX11. Can anyone suggest what can be wrong, please?