cod4 can someone please help ?

[crackthatoff]

when trying to play multiplayer the error code iw3mp.exe has stopped working keeps appearing, I have been on the activision website and apparently this is a common problem with the realtek sound card or something?
tried uninstalling the sound card like the website says but on start up it keeps re-installing.
I've also tried getting the latest software from dell, activision and realtek
any advice would be vvvv greatfully accepted !