Question about Dell Inspiron 6400 Notebook

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I have a dell inspiron 6400 and every time i turn it on i get a blue screen and it say: a problem has ben detected and windows has been shut down to prevent damage to your computer. UNMOUNTABLE_BOOT_VOLUME stop: 0x000000ED (0x86F42900,0xC000009C,0x00000000, 0x00000000) Need help plzzz

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Hi there,

We wish You a very Happy New Year.

Which is the operating system? I would give you steps for windows vista.
Post back if any other.

You "might" be able to fix it this way (assuming its a glitch in the drive).


From a Operating system disk - (you can also try from the Dell Recovery Console)

Run CheckDisk on it from Operating system as below

chkdsk /f /r

Spaces after k before / and after f before

This error can either be caused by a problem with an IDE cable or the BIOS in which case you just replace the cable or reload the fail-safe default settings in the BIOS. However, most of the time this error is caused by some sort of problem with the volume.

To fix this problem you will need:

  • A copy of the Windows Installation Disc
  • About 1.5hrs of time
Fixing the problem:
  1. Boot up your computer to the Windows Installation Disc (You may need to press a button like F12 to see the boot menu)
  2. When the Windows Welcome Screen loads press the R key on your keyboard
  3. Once you get to the command prompt type chkdsk /r then press Enter
  4. When the check disk is complete you will be returned to the command prompt
  5. Type fixboot and press Enter
  6. When the fixboot is complete, type Exit and press Enter
  7. Your computer should reboot and your problem should be gone.
More options which "might" work.

This tells you how to access the System Recovery Options and/or use a Vista Disk
Try StartUp Repair from Recovery Options or Vista disk.
How to do a Startup Repair
Unable to boot in windows vista- windows boot configuration data file is missing required
information - Repair Corrupt Boot Manager
How to use the Bootrec.exe tool in the Windows Recovery Environment to troubleshoot and
repair startup issues in Windows Vista
How to fix "BOOTMGR is missing" in Windows Vista
Error message when you start Windows Vista: "The Windows Boot Configuration Data file
is missing required information"
Vista Tip: Repair "BOOTMGR is missing" error - a quick how to
See this section here - To repair/rebuild the Boot Config Data Use the Bootrec.exe Tool


If you do not have a Vista 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 Make a Bootable Disk in Vista

Download: Windows Vista x64 Recovery Disc

Download: Windows Vista x64 Recovery Disc

How to Make a Windows Vista Repair Disk If You Don't Have One


Have you been able to gain access to the Setup/Settings (BIOS/CMOS) as you boot?
If not you are spinning your wheels as the I/O issue is below the operating system level.
If you can get in regularly then the problem might be repairable. Intermittent access to
the BIOS is just further proof that the system has serious hardware issues.

Frankly if you can access the system at all I would backup the data off the main drive
and preferably using several techniques for redundancy off the computer entirely. Then
I would format the drive and re-install Windows to do as much as possible to remove the
I/O issue from being software related. However, doing this is not likely have a high success


0x000000ED is a very serious I/O Error :

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.

There is a possibility that the root cause could be a loose or defective contacts or cabling
though that too only holds an outside chance.

Another possibility is readdressing or updating your BIOS however doing that on an unstable
machine has very real additional risks and should be done by technical support in this case.

If needed :

Dell Support

Dell Drivers - Product Manuals & Warranty Info (left side) - Tech Support and more

Dell Forums

These might help.

How Do I Start My Dell™ Computer in the Windows Recovery Environment (WinRE) for Microsoft
Windows Vista?

How Do I Start My Dell™ Computer in the Windows Recovery Environment (WinRE) using the Microsoft
Windows Vista® DVD?

What Is the Microsoft Windows Vista® Recovery Environment (WinRE) and System Recovery
Options Menu?

Hope this helps.

Posted on Jan 01, 2011

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Its called the blue screen of death and it could have been caused by something you installed recently or a hardware issue, have you tried booting your computer into safe-mode using the F8 key if you cannot boot into safe-mode without getting the same issue then you may have to format your hard drive

Posted on Jan 01, 2011


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