TPM Code 45 error

PIK13 · ‎12-08-2023

TPM Code 45 error

erico · ‎12-08-2023

Interesting.
AFAIK your motherboard does not have the required TPM.

AMD markets the installed processor as supporting Windows 10, not Windows 11.

https://www.amd.com/en/products/specifications/compare/processors/8351,8226

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PIK13 · ‎12-09-2023

Hi Erico, thanks for your reply. Yes, you're right this system was originally designed for Win10 . It wasn't compatible with Win11 because of the processor but it does have a TPM 2.0. Win11 was installed using Rufus and subsequently it is now running 23H2. The BIOS was upgraded to F36 and somewhere along the line I lost the TPM. I have enabled it in BIOS but Windows does not recognise it and in Device Manager I see the Code 45 error telling me it is not connected. I have run various hardware diagnostic tools and checked for driver updates but none of these has any effect.

erico · ‎12-09-2023

You can check that the the TPM chip is present and working.

"

You can also check the TPM Management Console by following the steps below:

Press the Windows + R keys on the keyboard to open a command prompt.
Type tpm. msc and press Enter on the keyboard.
Verify that the status for TPM in the management console shows as Ready

Are you using Bitlocker?

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PIK13 · ‎12-09-2023

TPM.MSC opens the TPM window but says a compatible TPM cannot be found, Device Manager has a driver for it - 10.0.22621.2506.

I am not using Bitlocker.

erico · ‎12-09-2023

Which TPM chip version is installed?

You can find the specification in the TPM.MSC dialog window.

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PIK13 · ‎12-11-2023

2.0 Driver version is 10.0.22621.2506

erico · ‎12-11-2023

Did there happen to have been a Windows update just before the issue showed itself?

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PIK13 · ‎12-11-2023

Not that I was aware of but the BIOS was updated and that is when I noticed the issue.

PIK13 · ‎12-16-2023

Thanks for your help Erico. I did find this on the forum

Solved: TPM - HP Support Community - 8285995

so maybe we can assume it is a bug. Either way it doesn't seem to be causing any problems.

Merry Christmas

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