Assistance with SPM (Secure Platform Module) Provisioning on HP ProBook 450 G8

[Tcoder]

Hello HP Support,

I am using an HP ProBook 450 G8 Notebook PC, and I am trying to enable or provision the Secure Platform Module (SPM) in order to use features that require TPM functionality (such as BitLocker or Windows 11 requirements).

My BIOS is up to date (T70 Ver. 01.21.00, dated April 9, 2024) and I have attempted to provision the SPM using the HP CMSL tool and the Set-HPSecurePlatformPayload command with the official spm-enable.bin payload.

Although the command executes successfully, the SPM state remains NotProvisioned, and the BIOS does not provide any option to enable or configure TPM/SPM manually. The tpm.msc utility in Windows also reports "Compatible TPM cannot be found."

I understand that my warranty has expired, but I would like to confirm:

1. Whether my specific device model and serial number supports SPM provisioning.

2. If it is currently firmware-locked from provisioning, or if there are additional tools or steps that can help enable it.

3. Whether any paid service is available to perform this provisioning if needed.

If you need any additional information (such as serial number, system logs, or screenshots), please let me know — I am happy to provide whatever is required to assist in resolving this issue.

Any guidance you can provide would be greatly appreciated.

Thank you in advance for your help.

Best regards,

[banhien]

@Tcoder 

Please read the following document first

           https://developers.hp.com/hp-client-management/blog/hp-secure-platform-management-hp-client-manageme...

Then use

       https://developers.hp.com/hp-client-management/blog/hp-sure-admin-step-step

Regards.

[Tcoder]

I am trying to provision Secure Platform Management (SPM) on my HP ProBook 450 G8 (BIOS version T70 Ver. 01.21.00) using the HP Client Management Script Library (CMSL).

Here are the steps I followed:

1. Generated the endorsement key (kek.pfx) and signing key (sk.pfx) certificates using OpenSSL.

2. Verified the current Secure Platform Management state using Get-HPSecurePlatformState, which showed NotConfigured.

3. Attempted to provision the Endorsement Key and Signing Key using:

   • New-HPSecurePlatformEndorsementKeyProvisioningPayload and Set-HPSecurePlatformPayload

   • New-HPSecurePlatformSigningKeyProvisioningPayload and Set-HPSecurePlatformPayload

During the signing key provisioning step, I received this error:
"The request was not accepted by the BIOS."

I have not disabled the Physical Presence Interface (PPI), and after rebooting the device, the Secure Platform Management state still shows as NotConfigured.

Also, the BIOS does not show any option named “Secure Platform Management,” and running the PowerShell command Get-HPBIOSSettingValue -Name "Secure Platform Management" returns a "Setting not found" error.

TPM is not present or enabled on this device, as indicated by Get-TPM.

Could you please advise if the HP ProBook 450 G8 supports Secure Platform Management and what the correct procedure is to provision it? Also, how can I confirm if PPI needs to be disabled or if there are additional BIOS settings required?

Thank you for your assistance.