Cannot Enable Trusted Platform Module (TPM) as option is greyed out in BIOS

Cannot Enable Trusted Platform Module (TPM) as option is greyed out in BIOS



The article addresses an issue where users are unable to enable the TPM (Trusted Platform Module) in the BIOS for using BitLocker as it is greyed out on Latitude 10/ST2 and Venue 11 models.


Table of Contents:

  1. Cannot enable (TPM) Trusted Platform Module through the BIOS
  2. Enabling Trusted Platform Module Functionality in Windows 8 and 8.1

1. Cannot enable Trusted Platform Module through the BIOS

Users may report the Trusted Platform Module (TPM) option in Windows 8 optimized BIOS is greyed out. The option is unable to be changed.


2. Enabling TPM Functionality in Windows 8

Platform Trust Technology (PTT) is enabled on these systems by default, causing the TPM to be greyed out in the BIOS (Only one of these trust technologies can be enabled at a time). To enable TPM, PTT protection must be removed from the encryption keys.

To disable the PTT Protection and encrypt the hard drive through TPM:

  1. Suspend BitLocker if it has been initiated.

  2. Restart the system, and enter the BIOS

  3. Disable Secure Boot in the BIOS.

  4. Under Security Settings: Disable PTT, Enable TPM, Activate TPM, then save the changes

  5. Restart to the operating system and enable BitLocker

BitLocker should be functioning on the TPM once this is complete.

This configuration is currently seen in the Dell Latitude 10/ST2 and Venue 11 designs. Future systems may also include this technology.

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Article ID: SLN171773

Last Date Modified: 01/19/2017 08:51 AM


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