Using V14, I was working on rendering out a 96 minute film today and inadvertently had my source files on the same drive I was rendering to. V14 said it would take about 90 minutes to render, so I took off and when I came back, the render didn't complete and had an unmanaged exception error. I transferred the source files to another drive and rendered to another drive and the whole thing rendered in 9o minutes no problem. So from my experience, I'd recommend keeping your source files on a different drive from the one you render to. I had this issue earlier and thought it was a bit of a fluke, but now this has happened a few times, this practice seems prevent crashes during render. Honestly, this is the only crash or freeze I've had with Vegas in years and for some reason, it seems to be with V14. I don't remember having this problem with earlier versions.