I hope this helps someone else avoid frustration. I was unable to open the admin console as well and kept suspecting issues with Java 7 or Windows firewall, but couldn't get it to work. Finally I turned my attention to AVG Anti-Virus. I disabled the LinkScanner and when I ran the admin console I was finally asked by Windows firewall if I wanted to unblock the application. One I unblocked the admin console in Windows firewall it started up just fine. I then re-enabled the AVG LinkScanner and the admin console was still able to run.