Being a shooter video game fanatic, you would definitely have Halo: The Master Chief Collection either on Windows or on Xbox One. But users are frequently reporting about an issue UE4 MCC Fatal Error on Windows 10. This specific error in the Steam (the video game digital distribution service) occurs in several instances such as while playing in MP or SP.


Moreover, in some cases, the game simply locks up at the startup screen with the error. Gamers in the community have come forward with their possible solutions but the one thing that mitigate the issue is the installation of certain cumulative updates. Furthermore, you should also ensure that your Windows 10 is running the latest version.

UE4 MCC Fatal Error

Here is How to Fix UE4 MCC Fatal Error on Windows 10 –

1] Install KB3080149 and KB2670838

Microsoft provides preview builds, cumulative updates, Tuesday patches regularly to keep the operating system away from bugs and issues. Also, these releases include certain features that help the system to work faster and smoother. So, if you have not installed KB2670838 and KB3080149, you are likely to encounter UE4 MCC Fatal Error on Windows 10. Hence, the best applicable workaround is to install the patches right away. This is how you can proceed further –

  • Open any web browser and navigate to the Microsoft Update Catalog page. Search for the update KB3080149 and KB2670838 respectively.
  • Depending on your computer’s architecture, download the same.
  • Install it and Restart Windows 10 PC for effective results.

2] Check for updates

In addition to the KB updates, you need to ensure that your Windows 10 is running the latest version and all the updates are properly installed. The main reason for keeping the system up to date is to avoid the threats that it might have. Let us explore the steps below –

  • The system will scan and list down the available updates. Click Download to grab them right away.
  • If the update requires a reboot, carry it and try to play the game.

Hopefully, with the above-mentioned two solutions, you would be able to bypass UE4 MCC Fatal Error On Windows 10 pretty effectively. If you have some more tips to resolve this, do share them with us in the comments below.

That’s all!!!