your confusing 3Dmark05 with 06... your scores are normal.
the problem with the game is probably just some conflict in windows.
It is after all a HP aka same company as Compaq(comcrap), wouldnt be saprizing if it spits out driver conflicts or whatnot when you add after market hardware.
just to rule out a conflict with the sound card, you can go into device manager and disable your Sound card or Sound controller, and run the game without sound and see what happens.