The volume for a file has been externally altered so that the opened

Hello to everyone.


At the beginning I'd installed windows 10 with the legacy BIOS-MBR boot mode,but since I needed a Windows 10 installation that was able to boot using the EFI partition style,I have converted the partition scheme from MBR to UEFI with a tool and after this operation I have reinstalled Windows 10 from an old backup. This backup comes from the old BIOS/MBR installation of Windows 10. When I tried to boot Windows,I realized that it was not able to do that (no error message.but blinking cursor). I have so realized that the EFI partition didn't exist. So,I have created a new FAT32 partition and I have repaired the EFI partition following this guide :


How to Restore Deleted EFI System Partition in Windows 10? | Windows OS Hub


it worked,but only partially. Infact,since I need to put the "TESTSIGNING ON",when I gave this command :

Code:

Bcdedit.exe -set TESTSIGNING ON

I've got this error :


The boot configuration data store could not be opened. The volume for a file has been externally altered so that the opened file is no longer valid.


I tried a lot of methods to fix it,but right now unsuccesfully. Can someone help me ? thanks.

First, it would help us to see the result of a few commands. If you can boot from a Windows USB flash drive and open a command prompt, the commands would be:

diskpart
list volume
list disk
select disk 0
list part

Code:

C:\WINDOWS\system32>diskpart

Microsoft DiskPart version 10.0.20190.1000

Copyright (C) Microsoft Corporation.
On computer: JOHN-LAPTOP

DISKPART> list volume

  Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
  ----------  ---  -----------  -----  ----------  -------  ---------  --------
  Volume 0     E                NTFS   Partition    128 GB  Healthy
  Volume 1     C   Windows 10   NTFS   Partition    348 GB  Healthy    Boot
  Volume 2                      FAT32  Partition    100 MB  Healthy    System
  Volume 3     D   Data         NTFS   Partition    468 GB  Healthy
  Volume 4     R   RECOVERY     FAT32  Partition      8 GB  Healthy

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          476 GB  1024 KB        *
  Disk 1    Online          476 GB      0 B        *

DISKPART> select disk 0

Disk 0 is now the selected disk.

DISKPART> list part

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    System             100 MB  1024 KB
  Partition 2    Reserved            16 MB   101 MB
  Partition 3    Primary            128 GB   117 MB
  Partition 4    Primary            348 GB   128 GB
  Partition 5    Recovery           517 MB   476 GB

We need to see the output of those commands. What you need to do is reformat the FAT32 EFI System Partition you created, assign a drive letter to it, and then run a bcdboot command to write the BCD to it. An example of the bcdboot command would be:

bcdboot C:\Windows /s T: /f UEFI

That would assume that your Windows partition is assigned drive letter C: and you assigned drive letter T: to the reformatted EFI System Partition.

below u can see that I gave the commands like you suggested :



keep in consideration that windows is on drive E: and the EFI partition on drive Z:. The reinstallation of the EFI boot files worked great and now I'm using windows,but I still get the same error :

yes. I keep it always disabled. There is only a way to permanently disable the driver signature and I have already did it,giving the command :

Bcdedit.exe -set TESTSIGNING ON

I have also tried this :

λ bcdedit /set nointegritychecks on

but the error is still the same :

The boot configuration data store could not be opened.
The volume for a file has been externally altered so that the opened file is no longer valid.

Try it in the recovery environment (RE):
Go to start, power, then hold down shift when you click on restart.
At the recovery menu, click Troubleshoot, then Advanced, then Command Prompt.

Try the bcdedit command in that command prompt.

You can also get into recovery options by selecting the Repair this computer option if you boot from a Windows 10 USB flash drive (or DVD).

Also, are you absolutely sure the computer is booting from partition 1 on Disk 2 in UEFI mode? You have many drives installed in the computer and it may be booting from one of the other drives, and not in UEFI mode.

yes,check the name : headless. previously it was on letter E: ,now is on C:



- - - Updated - - -

which bcdedit command should I issue on the Recovery Environment ?

The testsigning on command. And your computer is not supposed to be booting from C: (headless). It's supposed to be booting from the EFI system partition. It's weird but the computer does not boot from the partition listed as "boot". The computer boots from the partition listed as "system"

probably you didn't read this :

How to Restore Deleted EFI System Partition in Windows 10? | Windows OS Hub

where it says :

list partition
select partition 1
format quick fs=fat32 label="System"

this is what I did. I selected the EFI partition 1 on the disk 2,I have assigned to it the letter Z: and I have quick formatted it giving to it the label of "System" as explained on the tutorial. That EFI partition is now on the drive J ; you can see it from the picture above,displaying all my disks.

- - - Updated - - -

1) Please run:

a) V2 > upload results directly into this thread
BSOD - Posting Instructions
How to Upload and Post Screenshots and Files at Ten Forums

b) diskparinfo.bat
Batch files for use in BSOD debugging

c) tuneup.bat
Batch files for use in BSOD debugging

2) Open disk management > by default some columns are compressed > widen each Status and Volume > make sure the contents within the parenthesis are in full view and that none of the characters are cutoff > view disk 0 > widen this row as needed so that all of the characters are in full view > post an image into the thread
Disk Management - How to Post a Screenshot of

3) Download and install Minitool Partition Wizard > click launch > post an image of the results into this thread
MiniTool Partition Wizard Free Edition - Free download and software reviews - CNET Download.com
MiniTool Portable Partition Magic Brings Easier Disk Management