Unmountable Boot Volume

Possible Duplicate:
How to fix UNMOUNTABLE_BOOT_VOLUME (0x000000ED) on my Windows XP DELL laptop?

I have a Toshiba Satellite L40. Two days ago, I turned it off by holding the power button and the next day it would not start at all. There is a blue screen with an error : UNMOUNTABLE BOOT VOLUME. I searched all over the net for a solution and did everything I could think of such as using the Windows 7 install disk and trying to repair with the command prompt (check c: /r, bootfix etc.). It runs the check saying there are no errors. However, when I restart I get the blue screen again. Can someone please give me some new solution?

Did you try with the Win7 Repair install like posted here? It works fine for me a couple of times, I even can recreate a missing bootloader and \BOOT folder after an file image restore.