Are you a fan of Call of Duty Modern Warfare 3 Zombies, but are having trouble getting it to work? You’re not alone.
Many players have reported issues with the game not starting or crashing on startup. But don’t worry, there are solutions to these problems.
In this guide, we will walk you through step-by-step instructions on how to fix Modern Warfare 3 Zombies not working. With our help, you’ll be able to get back to playing your favorite game in no time.

How To Fix Modern Warfare 3 Zombies Not Working?
1. Restart Your Game Client On ‘Run As Administrator’
The first thing you should try is restarting your game client on ‘Run as Administrator’. This can sometimes fix the problem, as it grants the game access to all necessary files and resources.
2. Verify File Integrity
If the first step didn’t work, try verifying the file integrity of the game. Here’s how to do it:
- Open your Steam library.
- Right-click on Call of Duty: Modern Warfare 3 and select Properties.
- Click on the Local Files tab.
- Click on Verify Integrity of Game Files.
- Wait for the process to complete and then restart your game.
3. Issuing A Fresh Re-installation Of The Game
If the previous steps didn’t work, you may need to issue a fresh re-installation of the game. Here’s how to do it:
- Uninstall Call of Duty: Modern Warfare 3 from your computer.
- Restart your computer.
- Reinstall Call of Duty: Modern Warfare 3 from your Steam library.
- Restart your computer again.
- Launch the game and see if the problem is fixed.
4. Update Your Graphics Card Drivers
Outdated graphics card drivers can sometimes cause issues with games. Updating your drivers can help fix the problem. Here’s how to do it:
- Open your Device Manager.
- Expand the Display Adapters category.
- Right-click on your graphics card and select Update Driver.
- Follow the on-screen instructions to update your drivers.
5. Verify Your Game Cache
If the previous steps didn’t work, try verifying your game cache. Here’s how to do it:
- Open your Steam library.
- Right-click on Call of Duty: Modern Warfare 3 and select Properties.
- Click on the Local Files tab.
- Click on Verify Integrity of Game Cache.
- Wait for the process to complete and then restart your game.
6. Contact Activision Support
If none of the previous steps worked, you may need to contact Activision support for further assistance by clicking here.
They may be able to help you with more advanced troubleshooting steps.
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