If that DXDIAG was run after a fresh boot of the computer, then you have a significant number of background processes running. Is the Superfetch service enabled? That certainly would cause stutters in the game, but then a number of things would.
How many background processes are running on that computer? Should be around 35 to 38.
Also note, if you are not expecting audio from television speakers over the HDMI connection to the television, then you need to disable the NVidia audio driver. It can cause some things to become unstable.
