This is my minidumb file
https://drive.google.com/folderview?id=0B7cyI_yycyn3Y2dVb0NRVUNVV1k&usp=sharing
My notebook is a few months old, problem started without any change in drivers or software etc.
HP Envy i5 ultrabook, 64b, win 7, Raydeon GPU.
Very annoying, seems most clearly hardware related.
I would appreciate your immediate response.
I consider going public with this very frustrating experience.