Windows 8 and 8.1 Forums


Windows 8.1 TPM chip specifications

  1. #1


    Posts : 2
    Windows 8.1

    Windows 8.1 TPM chip specifications


    Running Windows 8.1 on Dell E7440 laptop. UEFI BIOS and UEFI boot.
    The laptop has TPM chip from ATML (Atmel), Manufacturer Version 41.1., Specification Version: 1.2.
    Bitlocker is enabled and configured to use Require TPM pin at startup.
    When enter correct PIN it is allowed to start the laptop and are able to enter credentials to login to OS.
    When enter incorrect message "PIN Incorrect PIN; please enter the PIN again" is displayed.
    As We use this laptop in corporate We need to lock the TPM chip after number of incorrect attempts or require Bitlocker recovery password.

    After 35 attempts with incorrect startup PIN I gave up, because message "PIN Incorrect PIN; please enter the PIN again" is displayed only.

    Setting it by GPO also does not help - looks like it ignores those values.
    Trusted Platform Module Services Group Policy Settings

    Standard User Lockout Duration
    Standard User Individual Lockout Threshold
    Standard User Total Lockout Threshold

    Same behavior on HP EliteBook 840 but TPM chip from different Vendor.

    Does anyone know how to set lockout duration, after how many attempts should TPM lock and after how many attempts require BRP?

      My System SpecsSystem Spec

  2. #2


    Although I'm not well versed in Bitlocker, this Forum offers some excellent tutorials on the subject. Start with this one, at the bottom of it you will see links to various other tutorials in reference to Bitlocker. I hope this will help you.

    BitLocker - Turn On or Off for OS Drive in Windows 8
      My System SpecsSystem Spec

  3. #3


    Posts : 2
    Windows 8.1


    Thanks for repply, there are only basic settings which I already know :-).
      My System SpecsSystem Spec

Windows 8.1 TPM chip specifications
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