BSOD - UNMOUNTABLE_BOOT_VOLUME

Bug Check 0xED: UNMOUNTABLE_BOOT_VOLUME
The UNMOUNTABLE_BOOT_VOLUME bug check has a value of 0x000000ED. This indicates that the I/O subsystem attempted to mount the boot volume and it failed.

Alternative boot methods

Type the following command for disk recovery.

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c:\>chkdsk c: /R

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ChkDsk performs disk recovery, this might take a very long time. Let it run till completion.

Here's what you will see on your monitor when chkdsk ends:
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CHKDSK is checking the volume...
CHKDSK is performing additional checking or recovery....
...
...
CHKDSK found and fixed one or more errors on the volume.
5453434 kilobytes total disk space
121212121 kilobytes are available

4096 bytes in each allocation unit
121212121 total allocation units on disk
3037385 allocation units available on disk

c:\>
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When you see the c:\> , Chkdsk is finished.
Type exit to restart the system.

Restart your PC by typing exit.
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c:\>exit
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You've completed your system recovery, your system will hopefully restart.

Alternative recovery mechanisms

PcCare - Driver Verifier

Here's some useful links:


Demystifying the 'Blue Screen of Death'