Related to  rxapi not installed as service
Mark, attached is the info you needed from the installer.
I checked the registry entries already present in
regedit for rxapi at this point in the install, they
exactly match the normal registry. So, not sure why the
installer seems to be trying to start rxapi (since only
the top box was checked for rxapi), or what it is
trying to do that it pops this dialog box, endless
loop, must kill the installer.