Is It Safe to Clear MUI Cache in Windows 11

The MUI (Multilingual User Interface) cache is a Windows caching mechanism that stores localized strings (including names, file descriptions, and similar resource text). Hence, Explorer and other shell components display names quickly without re-reading each program's resource data.

The cache content varies by Windows version and component. Common places where you’ll see MUI cache entries include registry keys under:

HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\MUICache

Reasons You Might Clear the MUI Cache

• Privacy: MUICache entries often record application names and paths. Clearing can remove those traces from the registry.

• Troubleshooting: corrupted or stale cached strings (incorrect names, wrong language, garbage text) can sometimes be fixed by clearing the cache so Windows re-creates correct entries.

• Cosmetic cleanup: to remove incorrect or obsolete display names created by broken installers.

Clear the MUI Cache via Registry Editor

Registry Editor allows you to easily view and edit the list of all MUICache items on your system. Remember to back up the registry key(s) before making changes. Be aware that even if you delete MUICache items, they'll reappear the next time that you run the application.

1. Press Win + R, type regedit, and hit Enter.

2. Navigate to: HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell\MuiCache.

3. Right-click on the specific items in the right pane to delete them.

Using Wise Registry Cleaner to Delete MUI Cache

Wise Registry Cleaner can help you clean up the Windows registry within a few minutes, clean obsolete registry entries, fix registry errors, such as invalid ActiveX and COM components, invalid startup entries, useless or obsolete uninstallation information, and more. Obviously, it can also clean the MUI cache easily. Here is how:

Step 2. Scan and Clean

In the Registry Cleaner part, click the Scan button. You’ll see the MUI Cache scanning result in a few seconds. Then click Clean to clear it.

Conclusion

The MUI cache is a harmless Windows cache that stores localized names and strings for faster display in Explorer and related UI. Clearing it is usually safe and reversible, but it is mostly useful for privacy reasons or to fix bad cached strings, not for freeing space. You can clear it by using Registry Editor or Wise Registry Cleaner if needed.