Check c:\windows\minidump
There are .dmp files inside that folder?
no minidump file at all ? 
]not a suggestion but maybe a warning. I have an HP Pavilion dv6000 laptop with nvidia gpu and amd cpu. These things are apparently infamous for heating up to the point where the gpu fails. sometimes cured by resoldering the nvidia chip, sometimes(like mine) the whole motherboard needs to be replaced.
whats a safe gpu temp?