Some more details are required for us to give you a proper response, as already mentioned in the thread you are linking to. We need to see the Sandra report as requested in that thread. Please run sandra, go to the "Hardware" tab, and run the "Computer Overview". Post the complete results of the computer overview report here. It would also be helpful to know exactly what steps you are taking to achieve this particular problem you are having. Please be as painfully detailed as you possibly can, starting with how you are creating the session, what bit and sample rates, what tracks you are creating... every single mouse click and physical action you take up until the error occurs.