Real-time protection (Windows Defender, McAfee, etc.) may quarantine or block CAB extraction.
Right-click your Office installation file and select (using a tool like 7-Zip) to a folder on your desktop. Open the new folder and run setup.exe from there.
Inside that folder, rename to propsww.cab and proprww2.cab to propsww2.cab . Run the setup.exe from the root of this folder. 3. Re-download or Replace the Missing File If the file is truly corrupt, you may need a fresh copy. Setup cannot find ProPlus.WW\propsww2.cab - Microsoft Q&A
Running the setup directly from a compressed file or disc often causes this error.