Recover data from Win 7 BSOD SATA HDD Unmountable boot volume

Hello,

I was called in to take a look at a HP PC from 2006 which belongs to the president of a company. Sadly, the user saved all company data on this computer and possibly never backed up his pc.

The machine has a single 500gb sata hdd and it seems to be unmountable. I removed it from the PC and connected it to my laptop using a SATA to usb coverter. After 10 minutes of the drive buffering and trying to mount the volumes on my laptop, the volumes show up in disk management. However, when I click on the volumes it says I have to format the drive before I use it. I can’t do this as I am trying to extract the desktop data.

With the HDD in the original PC, when I try to put into safe mode it either crashes with a 00ed Unmountable boot volume Blue screen or if I try to boot into the recovery environment after pressing f8 I receive an I/O error 0xc00000e9 at the windows boot manager screen.
When I try to boot from my win 7 install media DVD it takes about 2 hours to extract and load the install screen where I can choose repair install and open command prompt. Actually the first time it took 2-3 hours. I haven’t been able to load this screen any more, it stays in a black screen after the windows splash screen.

Anyhow, the first time I tried run the bootrec /fixmbr commands, from the X: it could not find the commands..if I executed a wmic logicaldisk get name command I don’t see the Windows C: volume there either.

The big question:
If possible, how can I recover the desktop data from this drive?