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wayne70Flag for United States of America

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Windows 10 Error Code 0XC000000F

Dell T3500 running Window 7 64bit system was updated to windows 10 by enduser.  The system ran fine for a few weeks.  One morning the user returns to discover a blue recovery screen with  the following:
Your PC/Device needs to be repaired
A required device isn't connected or can't be accessed.
Error code: 0xc000000f
You'll need to use recovery tools.  If you don't have any installation media (like a disc or USB device), contact your PC administrator or PC/Device manufacturer.

Press enter to try again
Press F8 for Startup Settings
Press F9 to use a different operating system

The enduser tried  Enter, F8, and F9 nothing worked so they called me.

I used a USB stick loaded with Windows 10 installation files.  After booting to the USB drive I tried repairing the OS but then I receive a message saying the drive is locked.  I ran chkdsk /r it ran completely and reported no problems found.  I ran Dell's hardware test on the memory and hard drive.  It reported no problem found.  I then booted from a live CD to see if I could see the file structure on the disk and maybe recover the USER folder.  I could see some boot directories and a few other files but the main filesystem did not show up.  I also noticed that the system is reporting that there is 0 bytes free on the disk.  This was a disk that had more than 70% free space before the problem began. I used CloneZilla to make a backup image of the hard drive.

I am unable to determine which device is not connected

I need help to resolve this issue.
1. Preferred result recover the OS and all the data return system to service.
2. Second option recovery the data and   roll the system back to windows 7
3. At a minimum find and copy (recover) the USER folder so I can reinstall the system to Windows 7
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Peter Chan
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Are you able to get into Windows 10? If yes, you can rollback the current update of Windows 10, as Windows 10 is suffering from some recent update.
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Possibly scrambled or messed up partition table.

Try TestDisk and see what it makes of your partition information.  If you are not familiar with TestDisk then go through the tutorials on the site first.  You can run it from either the UBCD or Windows (you'll have to slave the disk concerned to a Windows system if you go this way).

UBCD  If you don't have it, then get it.
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David Johnson, CD
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it can simply be that the drive is trying to boot from a non bootable drive
so check if your boot drive is first in the BIOS- or UEFI system  - boot priority
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HuaMinChen no I'm not able to get into Windows 10 is there another way to rollback ?
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dbrunton I will try TestDisk and report back.
is it booting from the correct  drive?  you checked?
it's the first thing to do imo
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It has the steps that actually recovered the data.  The other answers were valuable and led to the final answer.  I marked this one as best so others looking for an answer to the problem will be able to follow the steps I took to actually recover the data.
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Victoria Mathis

Try to play with UEFI option

1. First, when turning on the computer, press and hold the "F2" key. You should be taken to BIOS.
2. Go to the "Security" tab inside BIOS and then go to "Secure Boot".
3. Disable "Secure Boot".
4. Now go to "Advanced" and then highlight "System Configuration" and hit Enter.
5. Go to the Boot Mode and change it to "CSM" mode.
6. Hit "Enter" on "SATA Controller" mode and set it to "Compatibility" mode.
7. Now you want to "Save" and "Exit".
refer to this URL:
for more informations and solutions.