"UNMOUNTABLE_BOOT_VOLUME" - Windows 7 laptop will not boot, goes to Blue screen after "Starting Windows" screen

My computer crashed this afternoon (I was not manually downloading any Windows updates). It cut to a Blue Screen. It read "UNMOUNTABLE_BOOT_VOLUME". I turned the laptop off and restarted it, and after the "Starting Windows" screen, the laptop shows the BSoD for a split second and abruptly shuts off, restarting (using a Safe Mode option, I see it is the same BSoD as before). All Safe Modes lead to the same thing as starting Windows Normally, and running Startup Repair leads to a blank black screen with an big white cursor. all input has no effect at that point.
 

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Last updated August 6, 2019 Views 105,505 Applies to:
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Answer

Hi,

Do you have a Windows 7 disk?

Run CheckDisk

chkdsk /f /r

Spaces after k before / and after f before /

How to Boot to the System Recovery Options in Windows 7
http://www.sevenforums.com/tutorials/668-system-recovery-options.html

How to Create a Windows 7 System Repair Disc
http://www.sevenforums.com/tutorials/2083-system-repair-disc-create.html

0x000000ED <-- read this
http://www.faultwire.com/solutions-fatal_error/UNMOUNTABLE-BOOT-VOLUME-0x000000ED-*1236.html?order=date

=================================

References to Vista also apply to Windows 7.

This is serious error and "may" not be repairable without professional tech support from
a real computer shop (not leeks and peeks at a BestBuy or other BigBox Stores) or your
System maker's Support.

Here are the troubleshooting methods to try to fix the issue :

Try Startup Repair - (If at ANY point you gain some but not full access to Windows come
back and try Startup Repair again.)

How to Boot to the System Recovery Options in Windows 7
http://www.sevenforums.com/tutorials/668-system-recovery-options.html

What are the system recovery options in Windows 7?
http://windows.microsoft.com/en-us/windows7/What-are-the-system-recovery-options-in-Windows-7

Try StartUp Repair from Recovery Options or Windows 7 disk.

How to Run a Startup Repair in Windows 7
http://www.sevenforums.com/tutorials/681-startup-repair.html

Recovering the Vista or Windows 7 Bootloader from the DVD
http://neosmart.net/wiki/display/EBCD/Recovering+the+Vista+Bootloader+from+the+DVD

Recovering the Vista Bootloader with EasyBCD (Windows 7)
http://neosmart.net/wiki/display/EBCD/Recovering+the+Vista+Bootloader+with+EasyBCD

Repairing the Windows Vista Bootloader (Windows 7)
http://neosmart.net/wiki/display/EBCD/Repairing+the+Windows+Vista+Bootloader

These are not your error however the fix might work.

Unable to boot in windows vista- windows boot configuration data file is missing required
information - Repair Corrupt Boot Manager (Windows 7)
http://www.troublefixers.com/unable-to-boot-in-windows-vista-windows-boot-configuration-data-file-is-missing-required-information/

How to use the Bootrec.exe tool in the Windows Recovery Environment to troubleshoot and
repair startup issues in Windows Vista (Windows 7)
http://support.microsoft.com/kb/927392

How to fix "BOOTMGR is missing" in Windows Vista (Windows 7)
http://cyberst0rm.blogspot.com/2007/04/how-to-fix-bootmgr-is-missing-in.html

Error message when you start Windows Vista: "The Windows Boot Configuration Data file is
missing required information"  (Windows 7)
http://support.microsoft.com/kb/927391

Vista Tip: Repair "BOOTMGR is missing" error - a quick how to (Windows 7)
http://lifehacker.com/251733/vista-tip--repair-bootmgr-is-missing-error

See this section here - To repair/rebuild the Boot Config Data Use the Bootrec.exe Tool (Windows 7)
http://www.vistax64.com/tutorials/163304-dual-boot-using-free-partitioning-software.html

=========================================

If you do not have a Windows 7 disk you can borrow a friends as they are not copy
protected. Your System maker will also sell the physical DVD cheap since you already
own Windows. Also you can make a repair disk on another computer.

If you need to make repair disks - these help repair Windows not re-install.

How to Create a Windows 7 System Repair Disc
http://www.sevenforums.com/tutorials/2083-system-repair-disc-create.html

Hope this helps.


Rob Brown - MS MVP - Windows Desktop Experience : Bicycle - Mark Twain said it right.
Rob Brown - Microsoft MVP - Windows and Devices for IT 2010 - current
Windows Insider MVP 2016 - current

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