Ensure you have not moved the setup.exe out of the folder where it was extracted. The installer requires the subfolder office.en-us to be in the same directory as setup.exe . Important Security Warning
By following these official methods, you will restore your Microsoft Office without exposing your computer to malware, corrupted language files, or future patch failures.
What exactly is this file, and why does it appear in errors? Officemui.msi Download
Look inside the subfolders (often named Office.en-us or similar, depending on your language) to locate the file, select it, and click . Method 4: Clean Reinstall via the Microsoft Account Portal
When the error pop-up appears asking for Officemui.msi , click . Navigate to your optical drive, USB drive, or mounted ISO. Ensure you have not moved the setup
Visit the official Microsoft Support page for "Language Accessory Pack for Office".
This is the safest, easiest, and only supported method for most modern Office versions. You will never need to manually handle an Officemui.msi file. What exactly is this file, and why does it appear in errors
If you have ever tried to repair, update, or uninstall Microsoft Office only to be met with a pop-up window asking for Officemui.msi , you know the frustration. This file is notorious for causing installation loops, failed updates, and error codes that seem to lead nowhere.
Scroll through the list and locate your suite.
