[Darryl Ramm]

And thanks for posting a Sandra report. It's actually unlikely to help with this type of problem, but always just a good idea to check. The only general things I can see is there is not a dedicated audio/session drive showing here. A good idea to do that with MPowered even if not formally recommended (I can't recall if Avid does or not). And it's also a good idea to get used to removing optical media from CD/DVD drives while running Pro Tools, neither of those things will be causing this problem.