League of Legends: How to fix "A critical error has occurred and the process must be terminated" error?

Published: 15:02, 08 November 2023
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League of Legends: How to fix "A critical error has occurred and the process must be terminated" error?
How to fix "A critical error has occurred and the process must be terminated" error in League of Legends?

Key Points from the Article

  • Update Windows and Graphics Drivers
  • Disable Full Screen Optimisation and Run as Administrator
  • Restart Your PC
  • Disable Firewall and Antivirus
  • Reinstall League of Legends and Riot Games
How to fix "A critical error has occurred and the process must be terminated" error in League of Legends?

These methods should help resolve the frustrating League of Legends critical error. Follow the steps carefully, and you'll be back to enjoying the game without any interruptions.

League of Legends, a wildly popular game, developed by Riot Games, and has not been immune to the occasional critical error that disrupts the gaming experience. 

The critical error, accompanied by a message stating, "A critical error has occurred, and the process must be terminated," can be extremely frustrating. 

But fret not, we've compiled a series of proven methods and possible fixes on how to resolve this issue, step by step.

1. Update Windows and Graphics Drivers

The first and most crucial step is to ensure your operating system and graphics drivers are up to date.

An outdated system can cause performance and bug-related issues. It's essential to stay current with Windows 10 updates and graphics drivers.

Updating Windows:

  • Open the Start menu and search for "Check For Updates."
  • Click on "Check for Updates," and any available updates will automatically download.

Updating Graphics Card Drivers:

  • Identify your graphics card (e.g., Nvidia) and open the respective software (e.g., GeForce Experience).
  • Look for the "check for updates" option on the home page and install any available updates.

2. Disable Full Screen Optimisation and Run as Administrator

  • This is a highly effective and widely acknowledged solution to the critical error.
  • When Full Screen Optimisation is disabled, and the game is run as an administrator, it prevents third-party applications from making unauthorized changes to the game files.

Steps:

  1. Navigate to the location where League of Legends is installed (typically on the system disk).
  2. Inside the Riot Games folder, locate League of Legends and delete the Data and Config files. These files store your game settings and may need a reset.
  3. Right-click on the League of Legends application and select "Properties."
  4. In the Compatibility tab, check the boxes for "Disable full-screen optimizations" and "Run this program as an administrator." You can also check "High DPI Scaling" under "Change High DPI Settings" for improved performance.

3. Restart Your PC

  • Restarting your PC may sound simple, but it can help resolve the critical error.
  • Keeping your PC on for extended periods can sometimes lead to issues. A fresh start may resolve the problem.

4. Disable Firewall and Antivirus

Background applications, overlays, or firewall settings can sometimes conflict with League of Legends. It's essential to ensure that no third-party applications or services interfere with your game.

Disabling Firewall:

  1. Search for "Firewall and Security Protection" and open it.
  2. Select "Allow an Application through Firewall."
  3. Click on "Change Settings" and uncheck "League of Legends (TM) Client."

Depending on your antivirus, follow similar steps to allow League of Legends to bypass security.

5. Reinstall League of Legends and Riot Games

  • If none of the above solutions work, consider uninstalling League of Legends and its client.
  • Ensure there are no leftover configuration files that could retain problematic settings after a fresh install.
  • By uninstalling both the client and the game, you essentially reset the entire game.

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