Hi, I got the exact same problem. It think its cause i skipped 6.1 and got straight from 6.0 to 6.2.
The solution is mentioned in the 6.1 loader thread:
"The C1E function in the bios (in some HP machines) needs to be deactivated."
Thats what you have to do - boot into bios (F10 at startup) and deactivate C1E under processor features.
Reboot and voila. :)