Same issue here too.
Windows Enterprise 7 x64, AMD MSI system.
When you first open the program after logging in the home page just sits there acting like it is loading, the little loading icon spins and spins and nothing will happen.
I've renamed my OOBE, did the delete the opm.db file. Verified that my firewall was not an issue (Turned off), Same for my home station, it is just not working.