Bitlocker and TPM

After ssd drive was installed and windows 10 was re-installed I could not encode the c drive again using bitlocker.
The following message comes up when the test to retrieve the recovery key from the TPM comes up:
The bitlocker encryption key cannot be obtained from the Trusted Platform Module (TPM).
The status of the TPM reads the TPM is ready with reduced functionality.
Please assist.
Alwyn SchutteAsked:
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McKnifeCommented:
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NEnterprise Systems EngineerCommented:
Hello,

Is the BIOS running in full UEFI or in legacy / compatibility?  TPM 2.0 requires UEFI for it to function correctly.
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McKnifeCommented:
That message wouldn't even show if there was a TPM detected. Presence of UEFI does not influence TPM detection.
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NEnterprise Systems EngineerCommented:
Hi McKnife.  I've had this error myself in the past and the TPM chip is detected.  The error states the TPM chip is ready.  When I had the issue a google search highlighted lots of other people that had the same error.  Fix was to ensure that the BIOS was in UEFI mode.  Also, Secure Boot needs to be enabled and the drive partitioned as GPT and not MBR.
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McKnifeCommented:
Hm... I jumped the gun, obviously, sorry.
Yes, I know that you need Win10 installed the GPT/UEFI way in order for TPM 2.0 to work, I agree, that needs to be verified by the author.
If the installation type is MBR, you can change it at least on win10 v1703 and v1709: https://docs.microsoft.com/en-us/windows/deployment/mbr-to-gpt
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Alwyn SchutteAuthor Commented:
When change to UEFi the ssd does not boot. Must the ssd also be partioned.
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McKnifeCommented:
Add more details to what you did. Did you verify the partitioning? That is the first step. Open diskmgmt.msc and count the partitions. Is there an EFI partition present?
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Alwyn SchutteAuthor Commented:
Hi McKnfe
There is no partinioning present. To be honest with you I am just trying to gather infomation for my local IT guys who is trying to fix the issue. My knowledge is very limited. How does one partition a solid state drive?
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McKnifeCommented:
NO partitioning? LOL. That would mean not even c:?
Ok, I understand, you see c: and only c: around. That means, if you looked at diskmanagement and not explorer (this is important), then you have indeed an MBR installation in front of you. In that case, see that your windows is updated to at least version 1703, create a full system backup and then use the linked tool MBR2GPT.
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Alwyn SchutteAuthor Commented:
Thanks will try.
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McKnifeCommented:
Alwyn Schutte, please return and keep this question open if it is not solved by objecting. In any case, share your solution if any or give feedback, please!
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Alwyn SchutteAuthor Commented:
The computer shop followed advice and was able to install bitlocker. Thanks for assistance.
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McKnifeCommented:
Now please close the question by selecting helpful (if any) comments as answers.
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Alwyn SchutteAuthor Commented:
Bitlocker was successfully installed.
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Alwyn SchutteAuthor Commented:
All I can say is that I showed the comments to the IT person who tried to install bitlocker and a few hours later it was done. Therefore I accepted the answer to have solved the problem.
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