MUI file icon

MUI File Extension

Multilingual User Interface Format
  • Developer
    Microsoft
  • Category
  • Popularity
    4.1 (15 votes)

What is MUI file?

The Multilingual User Interface, laying behind the MUI file format, is a technology developed by Microsoft for Windows system, MS Office and other software, which enables installation of multiple interface languages. Content of MUI files is data for a program or a .DLL file, which are necessary to change interface language within a given program.

Interesting facts about MUI files

  1. It is worth mentioning, that MUI format has emerged only in the Windows 2000 system, and is obviously present in all the newer versions.
  2. According the presumption, MUI files take names after .EXE or .DLL files they refer to, for example: notepad.exe.mui. However, it just a guideline, which is not always reflected in a system.
  3. Every MUI file is assigned with a location, in which data concerning a given language is contained, therefore such files are usually encountered in subfolders with names including specific languages. For instance, within WINDOWS 7 operating system, there are 35 versions of the tipresx.dll.mui file, located in the following directories:

    \Program Files\Common Files\microsoft shared\ink\ [language symbol] \tipresx.dll.mui

Programs which support MUI file extension

Programs that can handle MUI files are as follows. Files with MUI suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

Programs that support MUI file

Updated: 12/19/2021

How to open file with MUI extension?

Problems with accessing MUI may be due to various reasons. Fortunately, most common problems with MUI files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Download and install Windows Multilingual User Interface

Install software to open MUI file The most common reason for such problems is the lack of proper applications that supports MUI files installed on the system. The most obvious solution is to download and install Windows Multilingual User Interface or one to the listed programs: Microsoft Windows. The full list of programs grouped by operating systems can be found above. If you want to download Windows Multilingual User Interface installer in the most secured manner, we suggest you visit website and download from their official repositories.

Step 2. Verify the you have the latest version of Windows Multilingual User Interface

Update software that support file extension MUIIf you already have Windows Multilingual User Interface installed on your systems and MUI files are still not opened properly, check if you have the latest version of the software. Software developers may implement support for more modern file formats in updated versions of their products. If you have an older version of Windows Multilingual User Interface installed, it may not support MUI format. The latest version of Windows Multilingual User Interface should support all file formats that where compatible with older versions of the software.

Step 3. Set the default application to open MUI files to Windows Multilingual User Interface

If you have the latest version of Windows Multilingual User Interface installed and the problem persists, select it as the default program to be used to manage MUI on your device. The next step should pose no problems. The procedure is straightforward and largely system-independent

Associate software with MUI file on Windows

Change the default application in Windows

  • Clicking the MUI with right mouse button will bring a menu from which you should select the Open with option
  • Select Choose another app → More apps
  • The last step is to select Look for another app on this PC option supply the directory path to the folder where Windows Multilingual User Interface is installed. Now all that is left is to confirm your choice by selecting Always use this app to open MUI files and clicking OK.
Associate software with MUI file on Mac

Change the default application in Mac OS

  • Right-click the MUI file and select Information
  • Find the Open with option – click the title if its hidden
  • From the list choose the appropriate program and confirm by clicking Change for all....
  • If you followed the previous steps a message should appear: This change will be applied to all files with MUI extension. Next, click the Continue button to finalize the process.

Step 4. Ensure that the MUI file is complete and free of errors

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the MUI file in question. Problems with opening the file may arise due to various reasons.

Check MUI file for viruses
1. The MUI may be infected with malware – make sure to scan it with an antivirus tool.

If the MUI is indeed infected, it is possible that the malware is blocking it from opening. Scan the MUI file as well as your computer for malware or viruses. If the scanner detected that the MUI file is unsafe, proceed as instructed by the antivirus program to neutralize the threat.

2. Check whether the file is corrupted or damaged

If the MUI file was sent to you by someone else, ask this person to resend the file to you. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. When downloading the file with MUI extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Ensure that you have appropriate access rights

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Check whether your system can handle Windows Multilingual User Interface

The operating systems may note enough free resources to run the application that support MUI files. Close all running programs and try opening the MUI file.

5. Verify that your operating system and drivers are up to date

Up-to-date system and drivers not only makes your computer more secure, but also may solve problems with Multilingual User Interface Format file. It is possible that one of the available system or driver updates may solve the problems with MUI files affecting older versions of given software.

Do you want to help?

If you have additional information about the MUI file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on MUI file.

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