I loaded the software cd that the cameras came with (arcsoft software cd). I think it has to do with the video being 60fps. I tried 1080 in 30fps and the preview loaded better, however, still no sound. Also, I tried making a trial video with video files that actually played properly. I made a short video, and rendered it. Then when I went to play it back, the video was black with no sound. The length of video was correct but nothing played back. I tried rendering it as an mp4, mp2, wmv, mov, and avi file. This is really frustrating, especially since I just spent $100 on it.