I have a problem with my Nero Vision. Everytime I go to either edit the video, preview it for finding chapters, or previewing the menu and video before burning, it doesn't play right. The audio works find but the video lags and just pauses, rather than playing. I know its not the source because it is fine, and plays in other plays perfectly well (including Nero Show.) Its also not the file types because i've tried mp4, avi, mpeg and they all get the same result. The oddest part is that it was working fine a few weeks ago, and now it doesn't even work. And I've had no major new installments on my computer.