I also had this problem (geez, what problem with G/F did I NOT
have), for me this fixed it:
WIN Button + R -> type 'dxdiag' -> Go to the Sound tab (note: if you got 2+ soundcards, there will be 2+ tabs, find the one that represent the soundcard your game is using) -> There should be a slider right under "DirectX Functions" (Don't know the english name for it) -> Be absolutely, positivly sure that that bar is maxed out to the right ("Full acceleration" or something along these lines).
Now exit the window and fire up the game.
Hope that helps as much as it did for me