I am having this same issue. I would not think it has anything to do with the graphics card but more to do with the HDD. I have run the file repair every time it comes up but it never fixes any files. I have also run Error Checking on my hard drive just to see if there was a problem with that.
I have also always had the same error messages every time it crashes. Next time it crashes I will post it here but at this point, I have a hard time believing it is anything on my computer itself.