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TPM is Unable to Change Between 1.2 or 2.0 Because TPM is Owned

Résumé: This article describes an issue where the TPM cannot be configured because it is in an owned state.

Cet article concerne Cet article ne concerne pas Cet article n’est associé à aucun produit spécifique. Toutes les versions du produit ne sont pas identifiées dans cet article.

Symptômes

The TPM cannot be configured because it is already in an owned status.

Cause

Every time that a Windows 10 system with TPM is restarted, Windows 10 will take ownership of the TPM automatically, unless Windows 10 is specifically instructed not to take ownership.

The process of upgrading to TPM 2.0 or downgrading to TPM 1.2 requires that ownership be released prior to the change.

Résolution

These instructions will prevent Windows 10 from automatically re-taking ownership of TPM:
  1. Run PowerShell as an Administrator: (Type PowerShell in the Search box, right-click PowerShell on the menu, click Run as Administrator.(See Figure 1.)

    SLN302620_en_US__1Opening-Powershell-with-admin
    Figure 1. Opening PowerShell
  2. In Powershell run the following command: Disable-TpmAutoProvisioning then press the Enter key. (See Figure 2.)

    SLN302620_en_US__2Disable-TPM-autoprovisioning
    Figure 2. Disabling TPM Auto-provisioning in PowerShell.
  3. If Dell Data Protection (DDP) is installed, you will need to complete these additional steps:
    1. Open the Services Desktop App (Type services.msc in the search box, then press the Enter key)
    2. Set the DellMgmtAgent Windows service to Disabled
    3. Stop the DellMgmtAgent Windows service
    4. Set the DellMgmtLoader Windows service to Disabled
    5. Stop the DellMgmtLoader Windows service
    6. Proceed with clearing the TPM
  4. In the search box, type the command: tpm.msc then press the Enter key to open the TPM management console. (See figure 3.)

    SLN302620_en_US__3Clear-TPM
    Figure 3. TPM Management Console
  5. Choose the Clear TPM option.
  6. The system will restart and then power off, then power on again.
  7. Do not enter the BIOS, let the boot back to Windows.
  8. Run the Dell TPM 1.2 firmware utility or Dell TPM 2.0 firmware utility with the AC adapter connected to the system.
  9. If Dell Data Protection (DDP) is installed, you will need to complete these additional steps:
    1. Set the DellMgmtLoader Windows service to Automatic
    2. Start the DellMgmtLoader Windows service
    3. Set the DellMgmtAgent Windows service to Automatic
    4. Start the DellMgmtAgent Windows service

Optional

You can run the following command using the command line to determine if the TPM is owned. (Press CTRL+R, type cmd, then right click cmd.exe and run as administrator)

Type: Wmic /namespace:\\root\CIMV2\Security\MicrosoftTpm path Win32_Tpm get /value then press the Enter key. (See Figure 4.)

SLN302620_en_US__4Command-line-TPM-status
Figure 4 - TPM ownership status

Informations supplémentaires

Produits concernés

Alienware, Inspiron, Legacy Desktop Models, OptiPlex, Vostro, XPS, G Series, G Series, Alienware, Inspiron, Latitude, Vostro, XPS, Legacy Laptop Models, Latitude Tablets, XPS Tablets, Fixed Workstations, Mobile Workstations
Propriétés de l’article
Numéro d’article: 000139777
Type d’article: Solution
Dernière modification: 26 Aug 2024
Version:  8
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