If you are prompted for this file, try these steps in order:
Please replace "https://example.com/Officemui.msi" with the actual URL where you can download Officemui.msi. Officemui.msi Download
The quest for an "Officemui.msi download" is almost always a symptom of a missing or corrupted Office language pack. The solution is a random download from a third-party script site, but rather obtaining the legitimate Microsoft Office language pack installer that matches your version and architecture. If you are prompted for this file, try
Sometimes, deleting the C:\MSOCache folder and restarting the installation forces Windows to re-copy the necessary .msi files from the source. Officemui.msi Download