Jeff -
For my believed registration issue on Adobe Pro X on a CS6 install, there are no indications. I double click on a .pdf file, or direct "open with" from drop down, or go to Programs and click on Acrobat Pro X - I think I saw a spinning Win wheel at first, but mostly nothing. You wait a while because Adobe always takes a couple of seconds to open, but still nothing. No errors.
I've re-installed CS6 since posting. If I have the issue again, I'll attempt MarilynRs steps.