This is the same build that was released to testers on May 23rd and the same one given out at WinHEC. Build 5384.4 to be exact. So there shouldnt be anything new or changed from the ones that the others have. As for the serial anyone can get it so that is no big deal. All you have to do is go to the Windows Vista site and they will give you one. If you choose the download method you will get the serial then and they will also send a email with the serial to you. So no need to share it since anyone can get one now.
I do not accept support questions via EMail, PM, IM or my G+ page!
Phone: LG Optimus G Pro
Running: Stock JB from LG with Nova Launcher