How-To Fix Steam Error Cannot Play Modern Warfare 3 Multiplayer | iw5mp.exe has stopped working

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My nephew sent me a text message recently saying he could happily play Call of Duty: Modern Warfare 3 Single Player Campaign and Spec Ops without any problems. But when he attempted to play the Multiplayer MW3 game it did not work. The error said something in the neighborhood of, “Steam Error Cannot Play Modern Warfare 3 Multiplayer, Please Tray Again Later”.

[adblockingdetector id=”1″]I have been able to play Call of Duty: Modern Warfare 3 multiplayer without any problems on my computer. So this problem puzzled me a bit. I did some research and tried a few things to fix the problem. While researching the problem I also found a similar Modern Warfare 3 error that is happening to people, “iw5mp.exe has stopped working.” There were various suggestions and fixes I found. Below are the ones that fixed my nephews problem and allowed him to play Call of Duty: Modern Warfare 3 once more. Please try Solution 1 first. If that does not work then proceed to solution 2.

Solution 1
1.1 – Open up Steam (Do not open up Modern Warfare 3. If it is open please fully close/exit the game).
1.2 – With Steam open RIGHT-click the Steam icon on your taskbar which is usually located on the bottom-right of your screen.
1.3 – Select “Library”
1.4 – RIGHT-click, “Call of Duty: Modern Warfare 3” and select “Properties”
1.5 – Click the “LOCAL FILES” tab
1.6 – Click the “VERIFY INTEGRITY OF GAME CACHE” button
1.7 – Please be very patient. This process may take up to 20 minutes.
1.8 – Once that is complete within the exact Library section you were just in go through the process again but for “Call of Duty: Modern Warfare 3 – Multiplayer” (Do the “VERIFY INTEGRITY OF GAME CACHE” thing for this too).
1.9 – When you have verified the integrity for both “Call of Duty: Modern Warfare 3” and “Call of Duty: Modern Warfare 3 – Multiplayer”, RESTART your PC Play Call of Duty: Modern Warfare 3 Multiplayer. Does it work? If yes then have fun 🙂 If it still does not work try Solution 2.

[adblockingdetector id=”5″]Solution 2
2.1 – Open up Modern Warfare 3
2.2 – Select the Multiplayer menu (do not hit play)
2.3 – Go to OPTIONS then select “Voice”
2.4 – Select “Yes” for “Mute All”
2.5 – Exit the game and restart your PC
2.6 – Open up Modern Warfare 3 multiplayer (but do not play it yet)
2.7 – Go into the Options>Voice again and make sure that “Yes” is still selected for “Mute All”
2.8 – If everything is okay then play Modern Warfare 3 Multiplayer

Do you have a different Call of Duty: Modern Warfare 3 multiplayer error message? Or maybe you have some other COD: MW3 multiplayer problem? If so feel free to post your exact problem below. Please write as much detail about your problem including specific error messages you are receiving would be great. I also need the following information about your specific computer…
– Specific Processor?
– Specific Graphics Card?
– How much Memory (“RAM”) you have?
– What version of Windows are you running (XP, Vista or 7) and is it 32 or 64-bit?

If you have another solution that solved your Call of Duty: Modern Warfare 3 multiplayer problem please feel free to post it below in the comments section. There is good chance someone will have your exact problem and only it can only be solved by you 🙂

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Tags: Call of Duty error, can't play mw3, iw5mp.exe