Ivanti Endpoint Manager version 2017.3 setup / install reports Failed "Checking database upgrade prerequisites"
RESOLUTION
On the Ivanti Endpoint Manager version 2017.3 Core Server set the Windows Registry key Computer\HKEY_LOCAL_MACHINE\SOFTWARE\LANDesk\ManagementSuite\Core\Connections\local\lsNTLM to False from True. Then click on the button "Try Again" and the Ivanti EPM 2017.3 setup will / should move on to the next step of "Upgrading database".