The boot selection failed because a device is inaccessible

Hey,

I need some help fast please. I recently booted up my gaming rig after swapping out a 7970 graphics card and upon system boot up, as the windows 7 logo appeared the system crashes and a BSOD appears for a split millisecond and I'm asked to start up repair windows or start windows normally however when I click start up repair a black error screen appears with the following message and error: The boot selection failed because a device is inaccessible error state and an error code:0xc000000e. Now of fixed this before multiple times except this instance nothing seems to work Ive tried the following:

- check for any unplugged or loose cables
- Re installed my ram
- Booted with on board graphics
- unplugged all usb devices and external devices with the exception of the keyboard and mouse
- Booted with system installation disc and attempted system repair several times only with the same outcome of wanting to restore from a previous system restoration point however it always fails
- changed the boot type to IDE which made the system boot furhter past the logo screen however it still crashes with the same error
- From the system installation disc I ran a chkdsk /f and no corruptions or bad sectors were found

However, I did run from the installation disc a "bcdedit" and my osdevice was unkown and my boot manager and boot loader were set to two different drives on being D: and the other being C:. So I re-linked all three back to the D: drive as the windows installation disc says thats where Windows 7 is installed, although in the actual windows 7 My Computer its listed as C: drive which is weird? anyways after re-linking them using bcdedit /set {default} osdevice partition=D: and the other two commands my recovery partition disappeared which was listed as C:, and now I can only see my local drive? That did not fix the error so I tried one last thing and ran another chkdsk D: /f /r which is taking for ages and I'm assuming my hard drive and its contents are still intact ( thank god!!) because its taking so long and there are 612080 files to be processed!

Any help or suggestions would be much appreciated

thanks guys!