Thanks for the replies, appreciate it. I was working on a computer with windows 7 system, no problems at all. I bought a new computer and installed windows 8. I installed my Adobe suite 5.5, no compatability issues arose. I had 2 movies edited using the old machine (windows 7) that I finished off in the new computer (windows 8). This is where I picked up the rendering problem. As a test, I put together movie clips for about 40 minutes in new work, (nothing to do with old computer) and I rendered with no problems. Could there be something on the windows 7 system that windows 8 was picking up and didn't like? Thanks for your feedback!