REAGENTC.EXE: Unable to update Boot Configuration Data.

Question

I am unable to enable WindowsRE?

Answer 1

(1) You've got two System partitions each with its own BCD. C partition is doubling as a System partition, & EFI is a System partition...

That is likely what is confusing ReagentC. It needs to find the BCD in order to enable the Recovery partition. We need to tell Windows that EFI is to be used -- not C. Let's try this...

DiskPart<<<Enter DiskPart

List  Vol<<<List the volumes & letters

Select  Vol  7           <<<Select EFI -- I guess it's still Volume 7

Assign  Letter=S     <<<Give it letter S -- unless List Vol shows it's already there

Exit<<<Exit Diskpart

BCDBoot  C:\Windows  /s  S:  /f  UEFI <<< **** Rebuild the BCD in EFI & all other boot files.

A reboot will be necessary to inform the rest of Windows of the change.

(a) I'm unsure that actually tells Windows to use EFI.

(b) I'm unsure whether that will also remove the System attribute from C.

(c) I'm unsure exactly what would remove it.

(d) So, maybe try this before the reboot...

REN C:\EFI EFI_unwanted <<<Rename the folder

..........................................................................

Then -- if it turns out it can't reboot -- you'll have to rename it back in the recovery environment, thus...

(a) At the Choose an Option screen, click "Troubleshoot > Advanced Options > Command Prompt".

(b) Enter the following commands...

DiskPart

List Vol

Exit

The Windows partition may have a different letter here. Use it instead of C in the following command...

REN C:\EFI_unwanted EFI <<<Rename it back

......................................................................

(2) After the reboot (presuming it did)...

Does BCDEdit /Enum {fwbootmgr} now show {bootmgr} on top?

Does BCDEdit /Enum {Bootmgr} name either HarddiskVolume9 or S: as the Device?

If so, try again...

ReagentC /Disable <<<Moves WinRE.wim to staging area

ReagentC /Enable <<<Moves it to the Recovery partition

ReagentC /Info <<<Show whether it is enabled

If it isn't enabled, let's see C:\Windows\Logs\ReAgent\Reagent.log. Just copy/paste the output of those three commands from the bottom of the log.

(3) A volume is a partition that has a file system on it. The Volume numbers enumerated by DiskPart are not the same as the HarddiskVolume numbers enumerated in the BCD. The BCD counts all partitions (with or without a file system) starting from Disk 0. Disk Management won't show them all. DiskPart will show them, this way...

DiskPart <<<Enter DiskPart

List Disk <<<List your 8 disks

Select Disk 0 <<<Focus on Disk 0

List Part <<<List its partitions

Select Disk 1

List Part

=== Continue with Disks 2 through 7 ===

Exit <<<Leave DiskPart

Looking at your prior listings, I now think the 8th partition down will be C. And EFI will be partition 9. Disks 0-5 will have 1 partition each, then Disk 6 shows...

So -- HarddiskVolume8 is the Windows partition. (EFI is HarddiskVolume9). Yep, the BCD that is on C (shown with /Store) shows the letter...

The one that is on EFI (S:) shows...

We want the one on EFI (S:) to be the only one. Windows gets confused when there is more than one System partition.

Answer 2

I attempted to rerun the commands again and it still did not enable. Here is the log https://gofile.io/d/Xgl4BP

Answer 3

Please try this workaround:

• diskpart
• sel vol 8
• assign letter=r
• exit
• md C:\Recovery\WindowsRE
• cd /d C:\Recovery\WindowsRE
• xcopy /h R:\Recovery\WindowsRE\Winre.wim
• xcopy /h R:\Recovery\WindowsRE\Winre.wim c:\windows\system32\recovery\
• reagentc /setreimage /path C:\Recovery\WindowsRE /target C:\Windows
• reagentc /enable
• reagentc /info

Edit: Added the assign letter command in diskpart.

Answer 4

Didnt work :( I might just have to live without Windows RE?...

Answer 5

It's a BCD issue. From the log file:

---

BcdOpenObject failed: 0xc0000034

winreGetWinReGuid BcdOpenObject failed: 0xc0000034

---

0xc0000034 is STATUS_OBJECT_NAME_NOT_FOUND

It's strange that this happens even after you fixed the boot files (in the other thread.)

Booting into WinRE using the USB disk and rebuilding the BCD might help.

diskpart

sel vol # - replace # with the FAT32 partition's volume number. It's your EFI partition.

assign letter=y

exit

cd /d y:\efi\microsoft\boot

attrib -s -h -r bcd

ren BCD BCD.bak

cd /d y:\efi\microsoft\recovery

attrib -s -h -r bcd

ren BCD BCD.bak

bootrec /rebuildbcd

It will scan for Windows installations.

Press "Y" when you see the following prompt.

Total identified Windows installations: 1

Add installation to boot list? Yes(Y)/No(N)/All(A):A

Note: If no Windows installations are detected, please run the bcdboot command-line mentioned in Step 5 on this page.

Boot into Windows and run:

• reagentc /enable
• reagentc /info

(Note: This user faced the same error, and the rebuildbcd command seems to have resolved the issue.)