Had it shut down on me again, via Vista timeout.
Vista bad take a timeout.
Think I found the problem with Vista PC anyway. I was converting with auto delete which is working well now. But I was putting them in a common file, I have since made a extra file and convert and put in it, move them to the common. Good ol Vista has problems with reading over 5000 files, so there was the glitch I presume. So far, I ran it most of the day without it shutting down. Live, bumble, bumble some more and mayhaps learn.