Windows 7: Unmountable_Boot_Volume

I've looked at a few threads on this forum to see if it can help but none do.

My recovery options are built in. And when I go to select some of the options they either freeze or say theyre doing stuff for over 6 - 7 hours. The only options I can select are Notepad and Command Prompt.

The weird thing on notepad is if I go to select my main drive it crashes the recovery, same for command prompt if I type chkdsk d: it wont do anything.

I've tried full destructive recovery, tried all sorts of commands but still nothing. Also its done it about 3 - 4 times in the past where full destructive recovery was the only option that worked so I've lost everything 3 - 4 times which is annoying but annoyingly it isn't working this time. I don't mind if i lose everything yet again but I find it annoying that I cant store important files because I know 2 months down the line the same error will appear.

Specs (roughly):

AMD Dual Core (forgot the name something like phenom)

ATI 5750

4GB RAM

750GB HDD

Thats all I know from the top of my head.

If you need some more information etc. Just ask hopefully you can fix this annoying recurring error.

Can you post Make & Model of PC.

I would Check the hard drive with the manufacturer's diagnostic tools.
Hard Drive Diagnostics Tools and Utilities (Storage) - TACKtech Corp.
HD Diagnostic