So you are on mix control 3.3...
Anyway not just your audio drivers please check my first post. Also please run windows update there were some major fixes recently.
Finally please could you give some information in your footer like mine, I didn't know you had a saffire for instance and I don't know your os.
As we see different behaviour for others and it is an engine crash, you need to explore these possibilities first. Thank you.
Good idea about enabling 64 bit.
Thanks