I haven't been in the office long enough to run another 4-6 hour video test yet.
I will try running without the Denon and see what happens. I'm also looking fro ways to disbale Windows Media Center. I've succeeded at some - but still getting some prompts that indicate it' still trying to do stuff in the background. (Yes Rick - mysteriously doing it's own thing!)
Now I know why they called it "Vista" (long view) - because if you could see it close up you wouldn't buy it!