Unable To Install RD Connection Broker Role Service On Server
Came across this problem when trying to install remote desktop services on Server 2012.
The solution is to open up services.msc (goto tools, then select services in the server manager)
Then find the service Windows Internal Database. Open it up and goto the log on tab. Change the account to the administrator account on your domain (or the admin account your logged on as). Restart the server and try install again and it should work :)