I saw a lot of issues here, and a lot of answers.. mostly around Intel and the GPU. However, I specifically have issues around Transitions. If I slide the Video, but not the audio, to overlap the previous video, then apply a transition ( it doesn't seem to matter which transition ) .. Vegas 16 will always die on the render AT the transition area. If I then move the video out of the overlap.. it can render through that point. Took me three hours to discover this issue after getting VERY frustrated.