Project and SharePoint Server 2013 – One or more required office components failed to complete successfully
When onsite this message come up when we were either installing or uninstalling the binaries.
Looking online suggested checking out PendingFileRenameOperations however this did not work for us.
We found turning UAC off, allowed us to install and uninstall the product. This was the case for four servers, and failed / worked in all cases.