I have the same problem with XP but it seems tied to Poser Temp files trapped in Norton's Recycle Bin. The temp files are generated during rendering and not flushed properly. I even have Norton's turned off but for some reason they still accumulate. I have to dump the recycle bin between renders or I can't get anywhere. Very strange, but it works for me. Might check for files in your recycle bin. Pinto