Are you bothered by MUI_NO_VALID_SYSTEM_LANGUAGE BSOD? If so, read this post now! Here, Partition Magic summarizes the possible reasons and available fixes for the issue. You can take it as a reference.
MUI (Multilingual User Interface) is developed to help users work on globalized apps in a localized manner. Sometimes, it prompts MUI_NO_VALID_SYSTEM_LANGUAGE BSOD, along with the bug check value 0x0000012A.
Actually, many users encounter this issue and many of them are bothered by it. Here is a true example on the forum.
My computer was running on windows 10 Chinese version, and I looked up online trying to change the current display language. So, I followed the instruction and removed the existing Chinese mui. This is where things start to go bad, it asked me to restart and I accepted, when it boots, I ended up in a BSOD telling me there is no valid system language.https://answers.microsoft.com
How to troubleshoot bug check 0x12A MUI_NO_VALID_SYSTEM_LANGUAGE? To solve the problem, you should find out the possible reasons for it. Well, the section below explains that. Please keep reading the post!
Causes of MUI_NO_VALID_SYSTEM_LANGUAGE BSOD
The MUI_NO_VALID_SYSTEM_LANGUAGE BSOD can be caused by various reasons. Some known causes are collected as follows.
- Malware or virus infection
- Corrupt language packs
- Misconfigured Registry settings
- Incorrect region or language settings
- Damaged system files
- Outdated Windows updates
- Faulty third-party software
Before trying the following solutions, you should run a virus scan. After confirming that your PC is safe, use the methods below to fix it. If the computer is stuck on bug check 0x12A MUI_NO_VALID_SYSTEM_LANGUAGE, boot the computer into safe mode and then start the operation.
- Repeatedly shut down the computer and power on it until it enters Automatic Repair Mode.
- Click Advanced Options > Troubleshoot > Advanced Options.
- Select Startup Settings and click Restart.
- Press F4 for Safe Mode or F5 for Safe Mode with Networking.
Solution 1: Correct Language and Regional Settings
You should correct language and regional settings when the Mui No Valid System Language blue screen error occurs. Here’s how to do that.
Step 1: Open Settings by pressing Windows and I keys.
Step 2: In the Settings window, click Time & Language.
Step 3: Hit the Language tab and then click Add a language.
Step 4: In the elevated window, choose a language to install and click Next to move on.
Step 5: Click Install to confirm the language.
Step 6: Tap on the installed language and click up arrow to set as default.
Step 7: Click on the desired language and hit the Options button.
Step 8: Click Settings under Regional format and then ensure the correct region is picked for dates, time, and numbers by opening Additional date, time & regional settings.
Step 9: Under Related settings section, click Administrative language settings. Then click Change system locale…, choose the appropriate language, click OK, and tap Apply.
Step 10: Restart the computer to make the changes to take effect.
Solution 2: Reset Language Settings
You can also reset language settings to solve Mui No Valid System Language error.
Step 1: Navigate to the Language option in Settings with the above instructions.
Step 2: Locate the Preferred languages section, click the language pack, and hit the Remove button.
Step 3: Repeat the above step to remove the rest language packs, but for the default one.
Step 4: Go to Administrative language settings > click Change system locale.
Step 5: Tick the box in front of the option “Beta: Use Unicode UTF-8 for worldwide language support”. Then click OK to save changes.
Step 6: Click Apply > OK to execute the operation.
Solution 3: Run SFC or DISM Scans
For damaged or missing system files, you can run SFC or DISM scans. To do that, follow these steps.
Step 1: Type cmd in the search box and click Run as administrator under the displayed Command Prompt app.
Step 2: In the User Account Control window, click Yes to allow the operation.
Step 3: Type sfc /scannow and hit Enter to execute the command.
Step 4: After the scan ends, type the following command and hit Enter.
DISM /Online /Cleanup-Image /RestoreHealth
Step 5: Restart the computer and check if the BSOD disappears.
Solution 4: Uninstall the Latest Windows Update
If MUI_NO_VALID_SYSTEM_LANGUAGE BSOD appears after you install an update, consider uninstalling the latest Windows update to resolve the error. Here’s how to do that.
Step 1: Open Settings and click Update & Security.
Step 2: Click View update history > Uninstall updates.
Step 3: Right-click on the recently installed update and click Uninstall.
Step 4: Wait until the process ends.
Solution 5: Reinstall Windows
The last resort to the bug check 0x12A MUI_NO_VALID_SYSTEM_LANGUAGE is to reinstall Windows. This is a thorough way to get rid of the error.
Step 1: Download the ISO file of the desired system from the official website of Microsoft.
Step 2: Use a piece of USB bootable software to burn bootable USB drive.
Step 3: Plug the bootable USB into the target computer and boot from it. To do that, restart the computer, enter boot menu, and click the bootable USB.
Step 4: Follow the on-screen instructions to complete the installation.
The End
Up to now, possible reasons and solutions for MUI_NO_VALID_SYSTEM_LANGUAGE BSOD have been shown to you. If you receive Mui No Valid System Language error, try the given methods to fix it.
About The Author
Position: Columnist
Having writing articles about computer tech for a long time, I am rather experienced especially on the aspect of computer optimization, PC enhancement, as well as tech terms explanation. The habit of looking through tech forums makes me a great computer issues collector. And then, many articles related to these issues are released, which benefit plenty of users. Professional, effective, and innovative are always the pursuit of an editing worker.