This is the latest version of the Desktop Runtime required for the PF3 update feature to work - it supercedes 3.1.28 which is why the warning message appeared when trying to install the earlier version. Thanks for flagging this - I've updated the informational forum post to reflect the newer version.3. There is no ".Net Core" File that i can locate in the Progams/Feature file in the Control Panel.
However another runtime file "Microsoft Windows Desktop Runtime - 3.1.32(x86)" now appears.
Martin