I am having a serious problem trying to play Call of Duty 4 on Windows 7. It plays fine for a short time then the audio kind of sticks, repeats it self like it is stuttering, then just closes the game. I went to the web site for Activision and they said there that I need to change the Realtek audio drivers to Microsoft Audio driver 6.0 available from Microsoft.com. I searched every way I could think of and can not find this driver. I really want to fix this since COD 4 looks like a great game, from what little I have been able to play. I am running Windows 7 build 7100, Realtek on board audio, Nvidia 9400 GTS vidio, Intel 2.0 GHZ CPU, on a Dell Inspiron with 2 GIG RAM. According to Activision this is a known problem so I am not alone with this, I hope someone that has had this happen to them can tell me what to do to fix it or where to get this driver they suggest will fix it. Thanks