Precision 3571 WinRE issue – reagentc error b7

Hello Dell Community,

I’m looking for guidance on restoring the Windows Recovery Environment (WinRE) on a Dell Precision 3571 after a disk layout change.

System information

• Model: Dell Precision 3571

• OS: Windows 11 (Build 10.0.26200.7462)

• Boot mode: UEFI

• Disk: GPT

• System boots and runs normally

Background

I was extending the C: drive, which required deleting the existing recovery partition.
After extending C:, I manually recreated a recovery partition and attempted to re-enable WinRE.

Since then, WinRE cannot be enabled again.

Current behavior

Running:

Always fails with:

And:

Shows:

No WinRE BCD entry is created.

What I have already verified

• Windows boots and functions normally

• Recovery partition exists and is healthy

• Recovery partition details:

  • GPT type: de94bba4-06d1-4d40-a16a-bfd50179d6ac

  • GPT attributes: 0x8000000000000001

  • Hidden = Yes, Required = Yes

  • NTFS, ~1 GB in size

• Winre.wim exists and is readable at:

  \Recovery\WindowsRE\Winre.wim

• dism /get-wiminfo confirms the image is valid

• reagentc /setreimage succeeds

• Recovery partition has no drive letter

• ReAgent.xml was reset

• BCD was rebuilt using:

  bcdboot C:\Windows /f UEFI

Despite all of this, reagentc /enable continues to fail with error b7, and WinRE remains disabled.

Question

Is this a Dell OEM–specific behavior on Precision systems?

Specifically:

• Does the Precision 3571 require Dell OEM recovery components or BCD entries that reagentc cannot recreate?

• Is there a supported way to restore WinRE without using the Dell OS Recovery USB?

• Or is the expected and supported approach to rely on external Dell recovery media once the original OEM recovery environment has been removed?

I want to ensure I’m following Dell-supported recovery practices for this system and not attempting something that isn’t intended to be rebuilt manually.

Any guidance from Dell engineers or users who have encountered this on Precision or Latitude systems would be greatly appreciated.

Thank you.