TPM Ready with reduced functionality; unable to use BitLocker

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  1. sygnus21
    Posts : 5,899
    Win 11 Pro (x64) 22H2
       New #11

    Cliff he said he did this the first time around. This is a replacement chip as he thought the first one was bad....

    The TPM is enabled in the BIOS, as are Secure Boot and UEFI, which are the requirements to using the TPM on Windows 10.
    At this point I can't think of what's going on having just installed a TPM module myself on my Z170 board. For me it was a simple job, install the module, double check the BIOS to see if TPM was enabled, and it was. Restart Windows, driver gets installed, restart Windows, all is good. I'm also running Windows 10 x64 Pro. Not sure what's going on with the OP's system.
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  3. Cliff S
    Posts : 27,182
    Win11 Pro, Win10 Pro N, Win10 Home, Windows 8.1 Pro, Ubuntu
       New #12

    Intel® PTT (Platform Trust Technology)implementation- PTT is a TPM2.0 implementation implemented as a FW application in ME- An OEM can use either a discrete TPM part, or use the Intel® PTT embedded in FW
    http://tce.webee.eedev.technion.ac.i...w-technion.pdf
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  4. Cliff S
    Posts : 27,182
    Win11 Pro, Win10 Pro N, Win10 Home, Windows 8.1 Pro, Ubuntu
       New #13

    It's two different settings as you can see in my BIOS shot here:


    Also might want to check your secure boot mode:
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  6. sygnus21
    Posts : 5,899
    Win 11 Pro (x64) 22H2
       New #14

    Yeah, I misunderstood you, I was thinking TPM. Anyway I just checked my BIOS and interestingly enough, mine is disabled, and yet no issues with my TPM module or BitLocker here....

    Intel Platform Trust Technology off...
    TPM Ready with reduced functionality; unable to use BitLocker-ptt.jpg

    Trusted Platform 2.0 Enabled...
    TPM Ready with reduced functionality; unable to use BitLocker-tpm.jpg

    Trusted Platform Management showing module is good...
    TPM Ready with reduced functionality; unable to use BitLocker-tpm-management.jpg

    All that said, it probably wouldn't hurt if the OP doubled checked the BIOS and tried enabling PTT to see what happens.

    And yes, Secure Boot is Enabled, along with Key Management.
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  7. MrPatko0770
    Posts : 15
    Windows 10 Pro
    Thread Starter
       New #15

    Well, I've looked all over BIOS, but no dice. I couldn't find a single reference to Platform Trust Technology or anything similar. But just in case it's of any help, here are screenshots from the TPM and Secure Boot settings panes, and a screenshot of the TPM Management Console.
    Attached Thumbnails Attached Thumbnails TPM Ready with reduced functionality; unable to use BitLocker-untitled.png   TPM Ready with reduced functionality; unable to use BitLocker-170310214316.png   TPM Ready with reduced functionality; unable to use BitLocker-170310214559.png  
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  8. sygnus21
    Posts : 5,899
    Win 11 Pro (x64) 22H2
       New #16

    Ok, I see something but I'm not sure what. On my TPM Management Console, the "Prepare the TPM..." is greyed out, while yours is active. Right pane under Actions

    TPM Ready with reduced functionality; unable to use BitLocker-tpm-management-console.jpg

    Click on that and see what it says or does...

    Let us know. Post an image of settings there if necessary.

    Awaiting answer...
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  9. MrPatko0770
    Posts : 15
    Windows 10 Pro
    Thread Starter
       New #17

    sygnus21 said:
    Ok, I see something but I'm not sure what. On my TPM Management Console, the "Prepare the TPM..." is greyed out, while yours is active. Right pane under Actions


    Click on that and see what it says or does...

    Let us know. Post an image of settings there if necessary.

    Awaiting answer...
    I've already mentioned it, but this is what happens when I press Prepare the TPM:
    TPM Ready with reduced functionality; unable to use BitLocker-ready.png

    Once I press Close, literally nothing changes. I can just click on Prepare the TPM again like nothing happened.
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  10. sygnus21
    Posts : 5,899
    Win 11 Pro (x64) 22H2
       New #18

    Well at this time I have no other suggestions other than to call Asus and see if there's something else that needs to be done or checked on that board.

    1. BTW What specific version of Windows 10 are you running?
    2. Are you on the insiders track?
    3. Also, where are you trying to save your TPM password to?


    Thanks.
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  12. MrPatko0770
    Posts : 15
    Windows 10 Pro
    Thread Starter
       New #19

    I'll try contacting Asus, but I'm probably just going to leave this be until I reinstall Windows someday and see if that fixes it (or hope that upgrading to Creator's Update once it comes out will just somehow fix it on its own). Thanks for your help so far.

    Also, regarding the password - I don't really save it anywhere, I've just temporarily disabled the new Windows 10 behavior where the password is automatically discarded after the TPM is provisioned just to see if that doesn't fix the issues and I just haven't switched it back yet.
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  13. sygnus21
    Posts : 5,899
    Win 11 Pro (x64) 22H2
       New #20

    MrPatko0770 said:
    Also, regarding the password - I don't really save it anywhere, I've just temporarily disabled the new Windows 10 behavior where the password is automatically discarded after the TPM is provisioned just to see if that doesn't fix the issues and I just haven't switched it back yet.
    If you're going to use TPM you'll need to save the password somewhere other than the drive being encrypted. Perhaps because you've not chosen to save a password is your issue??? I saved mine to a thumb drive. You can also choose to save it to your MS account.

    Humor us and try saving the password to a thumb drive and see what happens?
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