By
Lidia Rozo
2023-11-08 06:07:48

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How to Fix Modern Warfare 3 Campaign not working error and running with our expert tips and tricks.


Encountering issues with the Modern Warfare 3 (MW3) campaign early access can be frustrating. In this guide, we will provide you with friendly step-by-step instructions on how to troubleshoot and resolve the "MW3 Campaign Early Access Not Working" issue. Whether you are playing on a console or PC, these solutions will help you get back into the action and enjoy the game to its fullest.

How to Fix Modern Warfare 3 Campaign not working error


Section 1: Power-cycle your console or restart your PC


One of the first steps in troubleshooting any technical issue is to power-cycle your console or restart your PC. Power-cycling involves completely turning off your console or unplugging it from the power source and waiting for a few minutes before turning it back on. This process helps clear any temporary glitches or conflicts that may be causing the campaign not to work.


If you are playing on a PC, simply restarting your computer can have a similar effect. Restarting your PC clears the system's memory and closes any conflicting processes that may be interfering with the game.


To power-cycle your console, follow these steps:

  • 1. Turn off your console completely.
  • 2. Unplug the power cord from the console and the power outlet.
  • 3. Wait for at least 5 minutes to ensure all residual power is drained.
  • 4. Plug the power cord back into the console and the power outlet.
  • 5. Turn on your console and launch Modern Warfare 3.

To restart your PC, follow these steps:

  • 1. Save any open work and close all applications.
  • 2. Click on the Start button, then click on the Power icon.
  • 3. Select Restart from the options presented.
  • 4. Allow your PC to restart and log back in.
  • 5. Launch Modern Warfare 3.

Section 2: Ensure game download completion and wait for it to finish


If you are experiencing issues with the MW3 campaign not working, it is crucial to ensure that the game has downloaded completely. Modern games often have large file sizes and require significant download times. Interrupting the download process or launching the game before it is fully downloaded can lead to errors and issues with accessing certain features.


To check the download progress on your console, follow these steps:

  • 1. Navigate to the game library on your console.
  • 2. Look for Modern Warfare 3 and highlight it.
  • 3. Check the download progress indicated on the screen.
  • 4. If the download is not complete, allow it to finish before launching the game.

On PC platforms like Steam, the download progress is usually displayed within the Steam client. Look for the game in your library and ensure that the download bar reaches 100% before attempting to launch the game.

Section 3: Whitelist MW3 in antivirus and firewall apps





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Antivirus and firewall applications are designed to protect your system from potential threats. However, they can sometimes interfere with the proper functioning of games, including MW3. To ensure that the campaign early access works correctly, it is essential to whitelist MW3 in your antivirus and firewall apps.


Whitelisting MW3 will allow the game to establish necessary connections and communicate with the game servers without any interference. The steps to whitelist MW3 may vary depending on the security software you are using, but here is a general guide:

  • 1. Open your antivirus or firewall application.
  • 2. Look for the settings or preferences section.
  • 3. Locate the options related to application or program control.
  • 4. Add MW3 as an allowed or trusted application.
  • 5. Save the changes and exit the security software.
  • 6. Launch Modern Warfare 3 and check if the campaign is accessible.

Section 4: Verify integrity of MW3 game files using Steam's file verification feature


If you are playing MW3 on PC through the Steam platform, you can use the file verification feature to check for any corrupted game files. Corrupted files can prevent the campaign from working correctly. Verifying the integrity of the game files will identify any problematic files and replace them with the correct versions.


To verify the integrity of MW3 game files using Steam, follow these steps:

  • 1. Open the Steam client on your PC.
  • 2. Navigate to your Library and find Modern Warfare 3.
  • 3. Right-click on the game and select Properties from the drop-down menu.
  • 4. In the Properties window, go to the Local Files tab.
  • 5. Click on the Verify Integrity of Game Files button.
  • 6. Wait for the process to complete, and Steam will automatically fix any issues it finds.
  • 7. Launch Modern Warfare 3 and check if the campaign is accessible.

Section 5: Restart your PC and launch Modern Warfare 3


Sometimes, a simple restart of your PC can resolve various issues, including problems with launching the MW3 campaign. By restarting your computer, you ensure that any conflicting processes or temporary glitches are cleared, allowing the game to launch smoothly.


To restart your PC, follow the steps mentioned in Section 1. Once your PC has restarted, launch Modern Warfare 3 and check if the campaign is accessible.

Section 6: Battle.net users: Use the "Scan and Repair" feature


If you are playing MW3 through the Battle.net platform, you can utilize the "Scan and Repair" feature to troubleshoot and fix any issues with the game files. This feature scans your game installation and repairs any corrupted or missing files automatically.


To use the "Scan and Repair" feature in Battle.net, follow these steps:

  • 1. Open the Battle.net app on your PC.
  • 2. Go to the Games tab and find Modern Warfare 3.
  • 3. Click on the Options drop-down menu next to the Play button.
  • 4. Select Scan and Repair from the options.
  • 5. Wait for the process to complete, and Battle.net will fix any issues it finds.
  • 6. Launch Modern Warfare 3 and check if the campaign is accessible.

Section 7: Reinstall the game if previous solutions don't work


If none of the previous solutions have resolved the "MW3 Campaign Early Access Not Working" error, you may need to reinstall the game as a last resort. Reinstalling the game ensures that all files are properly installed and any potential conflicts are eliminated.


To reinstall Modern Warfare 3, follow these steps:

  • 1. Uninstall the game from your console or PC.
  • 2. Reboot your console or PC.
  • 3. Download the game again from the respective platform or insert the game disc.
  • 4. Follow the installation prompts to reinstall the game.
  • 5. Launch Modern Warfare 3 and check if the campaign is accessible.


By following these friendly steps, you should be able to fix the "MW3 Campaign Early Access Not Working" error. Remember to be patient throughout the process and avoid launching the game until all files have been downloaded and installed correctly. If you continue to experience issues, consider reaching out to customer support for further assistance. Happy gaming!


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