Call of Duty 4

Activision Support

https://activision.custhelp.com/cgi-bin/activision.cfg/php/enduser/std_alp.php

Common Errors

Listed below are some of the errors you may experience while trying to launch Call of Duty 4.

Steam Error: This Game Is Currently Unavailable

Please follow this guide

Every attempt to launch multiplayer results in the game crashing and an error message stating "iw3mp.exe stop functioning".

According to Activision, this error primarily affects Windows Vista machines. Below are two solutions from Activision and Infinity Ward, respectively:

1. Activision FAQ for users with a RealTek sound card.
2. Some users with Athlon XP processors are running into issues with the latest Miles sound file being incompatible. You may still be able to play the game by copying the following file into your Miles directory and replacing the newer mssmp3.asi with the following older mssmp3.asi used in older games such as Call of Duty 2.
   
   Download: mssmp3.asi.zip
   
   Note: Please only overwrite this file if you are using the XP version of the Athlon processor. This does not apply to the 64-bit version.
   
   Extract this mssmp3.asi file to the following folder:
   
   C:\Program Files\Steam\steamapps\common\call of duty 4\miles
   
   You will be prompted that this file already exists and asked if you want to replace it. Choose "overwrite" or "replace".

Error: couldn't load fileSysCheck.cfg. Make sure Call of Duty is run from the same folder.

This error happens when you attempt to launch the game without all of the content downloaded. If you are receiving this error and Steam reports that the game's status as 100% try validating your game cache files.

Right click Call of Duty 4: Modern Warfare > Click Properties > Click "Local Files" tab > Click "Verify Integrity of game cache"

Once the verification is complete Steam may download missing game content. When it reports 100% again you should be able to play.

Error: Failed to Contact Key Server

Please follow this guide.

Xfire

Customers have reported that using Xfire while trying to play Call of Duty 4 on Steam can lead to issues. Please follow the Programs Which Interfere with Steam guide for more information.

CD Key Registration on Steam

Retail CD-keys for this game cannot be registered through Steam. If you wish to create a shortcut to this game in your My games menu, please see the Overview: Adding non-Steam games to My games list topic for instructions.

PunkBuster

Please see the PunkBuster FAQ for more information.