Windows 7 COD 4 problems

Im unable too play Call of duty 4 for any lenghy periods. I can start up the game and start playing, but it sems too randomly crash afther 5-10min. Any1 else had any problems like this.

Im useing Geforce 9800 ultra, 4gram and intel quad core cpu.

Useing Windows 7 32bit 7057build

Demo works great for me in x64

I am running build 7068 in x64 and have no problems running the demo of CoD4. I am also running the Crysis SPDemo and Steam which indicate that they are in x64 mode. Check my sig below for my system.

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