Hi.
Give me a little more details on what you did, which level the game crashed......if it crashes on startup......error message(s) etc...... (full error message) Tell me everything you experience with the game.........Details please!.......The more details I get the more help I can provide!!!!!
Gravityforce - exactly what happens is this. Does not matter what COD4 server I enter. The game will boot without issue. I enter the game and actually start playing. It might last 30 seconds...it might last a minute, whatever, but the game simply either shuts down with the iw3mp.exe error OR my screen blanks out and I have to reboot. As a matter of reference, I can be using one of the Win8 apps...weather...news...etc. and they will crash going to the blank screen, causing a need to reboot. Other newer games that my son plays, FireFall, League of Legends, also crash to a blank screen. My computer was completely stable under Vista, any game any other program. I can run the COD4 on Win7, no issue. The only thing that has changed is that I mistakenly downgraded to Win8. It is the most unstable OS I have EVER encountered.
There is no way I can believe that this is a COD4 or PB issue. Again, COD4 runs under the other versions of Windows. PB would kick you with a PB error if it screwed up. It simply is a Win8 OS issue. I wish I was techie enough to go deeper than that. If I could get the option from MS to go back to my old OS, I would take it in a heartbeat. I have rebooted my computer more in the last month since downgrading than I have booted the computer in its entire 3 year life. Ridiculous.