Halion update-error code 1603 "Specified Account already exists"

Tried to install 10.05 update/
The Cubase update installs, but Halion 2 does not/ ran the installer as administrator after killing any kind of virus scanner programs/
I get the message “Specified Account already exists” and the Halion update installation dies/
Meanwhile every time i try this installation Steinberg MUST install the elicenser AGAIN before it gets to Halion 2 install/ WTF kind of process is this?
Can anyone help me update Halion? This is at least the second update that did not update Halion. Wondering if the Halion updates are worth it!
thanks in advance/
screen shot included