Scratched discs or incomplete downloads of ISO/EXE files.

Residual data is a major cause of pathing errors. Use the Microsoft Support and Recovery Assistant to perform a "clean" uninstall of any existing Office components before trying again. 3. The Rename Workaround (Advanced) Setup cannot find ProPlus.WW\propsww2.cab - Microsoft Q&A

Residual files from trial versions or older Office suites (like 2003 or 2007) can interfere with the path mapping.

Instead of running the installer directly from a disc or a single EXE, extract the files to your desktop to ensure the installer has direct access to all components.

Open the command (Windows + R) and drag your Office setup file into it. At the end of the file path, add a space and type /extract .

Viruses can sometimes delete or modify .cab files, leading to "file not found" errors. How to Fix the Propsww2.cab Missing Error