When did the blue screen show up? Can you still go to the safe mode of your OS? Or at least, can you go to the BIOS to check what does it say about your hard drive, in terms of capacity, number of clusters...etc.
Likely it is a h/w issue on your hard drive.
Having said that, you can pretend it is a s/w OS problem, and try to reinstall your OS. During the installation, I believe there is a step of H/W status checking. If it fails, then you know it is h/w problem for sure.