New
#221
Hi staralfur,
Welcome. Modern Warfare had the same issue... it was related to your sound. This may help: iw4sp.exe or iw4mp.exe Errors (Modern Warfare 2) - Call of Duty 4 Forums
There was a thread over at the Vista forums that went into greater detail... I'll try and find it.
**edit**
Here ya go: http://www.vistax64.com/gaming/171179-cod4.html
Between the two you should be able to sort this out relatively quickly.