What's your hardware specs (GHz, RAM, etc.)? You may want to try another capture application, like dvio (you can get it from the sticky threads). bb
Ok, the PC is not the fastest. Maybe there's an issue with your graphics card (or the drivers)?! I'm sorry, but I have no idea where your problems come from. I'd check out for current drivers, and look for support forums on the internet. bb
As your problem is Studio 8 not working, I think you should contact Pinnacle support.