When the Office installation wizard halts and requests that you "Browse to a valid installation source," it is typically triggered by one of the following underlying issues:
Proplus.ww is a directory (folder) that stands for and World Wide (a generic suffix). This folder contains all the core installation files for the 64-bit (x64) architecture of Microsoft Office Professional Plus. A counterpart folder for 32-bit systems is typically named Proplus.ww . Download - Proplus.ww Propsww2.cab Office
If you are seeing this error, follow these methods in order to resolve the issue. Method 1: Re-download or Re-copy Installation Files When the Office installation wizard halts and requests
If you are installing from a network share or an external optical disc drive: If you are seeing this error, follow these
If you are seeing this error during installation, try these community-verified steps:
Leftover files from an Office trial or older version are a primary cause of installation failures. Go to . Uninstall any existing Microsoft Office entries.
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