Crash at Start up Solution:
After installing it on my PC it kept getting crashes when I would launch the game. After a while of surfing the web I came to this and it completely fixed the problem.
I fixed mine on XP:
1) Right click MyComputer -> Properties
2) Click on Hardware tab
3) Click Device Manager
4) Disabled "Unimodem Half-Duplex Audio Device" under Sound, video and game controller
5) Start CoDWaW
Solution from Gamespot Forums.