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MUI_NO_VALID_SYSTEM_LANGUAGE BSOD Error [Fixed]
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Published onOctober 21, 2024
published onOctober 21, 2024
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Fix all BSoD events and keep computer safe and clean:
Fortect will find the cause of BSoD and fix it. Here is how to do it with 3 easy steps:
You can easily fix the MUI_NO_VALID_SYSTEM_LANGUAGE error with the right instructions.
Right after changing the default user interface language or modifying the existing language pack, you might see this Blue Screen. It often happens if the Windows UI language change doesn’t go how it should.
However, fixing thisBlue Screen loopis challenging since most Microsoft Community discussion threads usually suggest re-installing the OS.
If you’re looking for less exhaustive solutions, this is the article for you. I’ve tested more than 20 approaches to fix this BSOD error. After a stringent evaluation, here are the ones that reliably worked. Let’s dive in!
What Is the MUI_NO_VALID_SYSTEM_LANGUAGE BSOD Error?
MUI_NO_VALID_SYSTEM_LANGUAGE is a critical error of theMultilingual User Interface (MUI) technology. On Windows PCs, MUI helps users work on globalized apps in a localized way, like automatically changing software languages and providing API access to multiple language databases.
Here are more details of this BSOD event:
Stop Code:MUI_NO_VALID_SYSTEM_LANGUAGE
Bug Check Value:0x0000012A
Error Description:Windows did not find any installed language packs during phase I initialization.
Potential Causes
Usually, it’s caused by:
How To Fix MUI_NO_VALID_SYSTEM_LANGUAGE BSOD Error
Unfortunately, none of the usual basic troubleshooting can fix this issue, except a PC restart if you’re lucky. If a simple reboot doesn’t work, follow these methods:
Reboot Into Safe Mode
When the PC enters a Blue Screen loop, try these steps to revive it into a troubleshooting or diagnostic state:
If you can successfully enter Windows Safe Mode, reboot the PC. This should fix the BSOD loop temporarily.
Correct Language and Regional Settings
If you’re facing intermittent Blue Screen errors showing MUI_NO_VALID_SYSTEM_LANGUAGE, try these steps:
After rebooting, check for any pending updates inSettings>Update & Security>Windows Update.
Reset Language Settings
If manually adjusting doesn’t work, you’ll need to restore the MUI settings to default by following these simple steps:
Update Windows
You can force a Windows update by executing these steps:
Try Fixing the Corrupted Registry Entries
First, create a backup of the existing Registry database:
Here’s how to use theGlarysoft Registry Repair toolto fix broken Windows Registry entries or any otherRegistry errors:
Now that you’ve fixed the database with aRegistry cleaner, monitor if the BSOD error comes back.
Restore Windows to a Previous State
If you’ve been regularly creating restore points, follow these steps to revert the PC to a state when it wasn’t showing the MUI_NO_VALID_SYSTEM_LANGUAGE error:
Rebuild MUI Cache
Here are the sub-processes you need to execute to reconstruct the MUI cache:
Restart your PC and monitor its performance for several hours to check if the BSOD error returns.
Contact Microsoft Support
If none of the above works for you, installing a fresh Windows OS is the only option to resolve the MUI_NO_VALID_SYSTEM_LANGUAGE Blue Screen loop. However, before you do that, try contacting theMicrosoft Supportteam for advanced technical support.
Once you arrive on theContact uspage, click on theWindowslogo.
A dialog box will open forHomeandBusinesssupport choices.
Select the appropriate option and follow onscreen instructions to talk to an expert.
Reset the Windows OS
First, move all your files and downloaded content from C:\ drive to a different one for backing up data. Now, follow these steps:
Summary
So far, you’ve learned how to deal with intermittent or looped Blue Screens caused by MUI_NO_VALID_SYSTEM_LANGUAGE.
If any of the above methods helped you, feel free to mention them in the comment box. Also, if you know any fixes that I missed, do share.
More about the topics:BSOD,windows 10,Windows 11
Selma Citakovic
Content Editor
Selma is a tech fan and editor at Windows Report. She is also an experienced writer with a focus on cybersecurity, troubleshooting hardware and operating systems, gaming, and all things Windows.
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Selma Citakovic
Content Editor
Selma is a tech fan and editor at Windows Report. She is also an experienced writer with a focus on cybersecurity and all things Windows related.
