I had this same issue and have been trying for days to get WS 8 installed. Finally got it.
What worked for me:
Begin install of WS 8 as usual
Wait for error 1920 window to open. Leave it open.
Manually create group __vmware__
Manually create user __vmware__user_ with password
Then open services and change logon for VMware Authorization Service to use __vmware__user_
Start VMware Authorization Service
Go back to Error 1902 message and try again.
Installation finished and all was well after that.
This gives more info on creating user group and user
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=696