MUI File Documentation

Overview

Feature Value
File Extension .mui
Full Name Multilingual User Interface File
Type System File
Format Binary
Usage Contains localized resources for software running on Windows
Primary Association Microsoft Windows Operating System
Developer Microsoft Corporation
MIME Type application/octet-stream
Location %WINDIR%System32en-US (example for English)
Default Directory %WINDIR%System32
Editable No, proprietary format used by Windows
Compatibility Windows Operating Systems
File Signature (Hex) Depends on specific file content
Opens with Windows Operating System
Purpose To provide a way for applications to support multiple languages without the need for separate versions of the executable
Advantage Facilitates software localization
Structure Contains resources like dialogs, string tables, and other language-dependent resources
Encoding Varies with the language and resources
Alternative Use Can also store non-UI components, like help files
Update Method Through Windows Update or manual update of software/application
Security Considered secure, but as with any system file, can be a target for malware