Unmountable Boot Volume, BSOD

Hi. I have been charged with fixing a friend's computer. When she turned it on, she got the blue screen of death. A restart did nothing. I now have the machine. I have tried booting in safe mode, last known config, using the recovery console to run chkdsk /r, and I am still getting the bsod. The error on the blue screen is unmountable boot volume and the second parameter of the STOP is 0xC0000006. I don't know what to do at this point. I read about using TestDisk but I don't see how to get the program onto the machine. I've never dealt with this specific problem before so I'd appreciate some advice.