Searching for a usually happens when a Microsoft Office installation or update hits a snag. This specific file is a core component of the Microsoft Office Professional Plus suite (including 2007, 2010, 2013, and 2016 versions). If your computer says it can't find it, you're likely dealing with a corrupted installation or a missing cache file. What is ProPlusWW.msi?

Based on the syntax of the filename ( proplusww.msi ), you are likely looking for the installer for .

If you need this file to repair an Office installation or perform a fresh install, do not download the .msi file on its own.