I tried the help page workaround and this rectified licutil problem, but not the updaterstartuputility.exe issue. I am using the Adobe Creative Cloud Desktop App to manage the total install process. Thank you.
Beyond my knowledge now, sorry.
My last suggestions would be-
1. Run the Adobe Creative Cloud Cleaner Tool and use it to un-install all Adobe 'stuff', then re-install the CC Desktop App and re-install. ('painful' and time consuming I know- been there, done that)
2. Contact Adobe Support.
(and a thought- You are a subscriber to Creative Cloud? and you computer connects online with Adobe? )
TBMK licutil.exe is a 'Licence' utility that checks your activation status.
Another uninstall / reinstall seems to have rectified the error message issue. The problem with the blacked out screen was rectified by going to Edit/Preferences/Performance and unchecking the Use Graphics Processor box. Everything seems to be working ok now. Thank you.