The title says everything, how to solve it. The error is: iw5mp.exe isn't working anymore
Anyone can help me out?

Daan

Hello,

You could try disabling in-game services (such as screenshots) for MW3. That may prevent the game from crashing. The in-game service settings are located in the "Game Setup" tab of the "Settings" window. Select MW3 and click "Edit Game". Uncheck all checkboxes, and save.

1. Operating system name, and version (Example: Windows XP SP2, or Mac OSX 10.5.1). Please state the actual version number.
2. Mac users: Machine platform type (Intel or PowerPC).
3. GT Lite version number. This is located on "Help->About". This number will read similar to "1.2.0". Please state the actual version number.
4. Which game you are having an issue with (if applicable).
5. How you got the game you are having issues with (Retail, Steam, other please specify).
6. The version of the game you are having issues with. Please state the actual version number.
7. A brief description of how you get the crash and at which point it occurs. (ie. immediately after you open the game, before it stats up)