This process may take up to 20 minutes.ġ.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).ġ.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. If it is open please fully close/exit the game).ġ.2 – With Steam open RIGHT-click the Steam icon on your taskbar which is usually located on the bottom-right of your screen.ġ.4 – RIGHT-click, “Call of Duty: Modern Warfare 3” and select “Properties”ġ.6 – Click the “VERIFY INTEGRITY OF GAME CACHE” buttonġ.7 – Please be very patient.

If that does not work then proceed to solution 2.ġ.1 – Open up Steam (Do not open up Modern Warfare 3. Below are the ones that fixed my nephews problem and allowed him to play Call of Duty: Modern Warfare 3 once more. 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. I did some research and tried a few things to fix the problem. I have been able to play Call of Duty: Modern Warfare 3 multiplayer without any problems on my computer. The error said something in the neighborhood of, “Steam Error Cannot Play Modern Warfare 3 Multiplayer, Please Tray Again Later”. But when he attempted to play the Multiplayer MW3 game it did not work. 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.

Mw3 pc free