First off, sorry about the trouble!! Good news, I have an answer for you...
When you first install NBC Direct, it attempts to connect to the internet in order to register your PC. This is why you don't see a place to physically register your own computer...it's a background operation.
If you're getting that PC registration error, it's because when NBC Direct tried to connect to the web, something interfered. This could be one of two things:
1. A firewall is blocking its access
2. Your internet connect was temporarily unavailable
Typically, this should fix once it establishes a connection to the internet; however, if it doesn't try uninstalling both NBC Direct and the OpenCASE Media Agent and reinstalling the program. Make sure you're firewall will let you get through and/or you're online.
If you're uninstalling NBC Direct, be sure to use this
Microsoft Clean Up Tool to make sure you get all the pieces and parts or you won't be able to reinstall it.
Please let me know if this works!