Need to update Toshiba Portege TPM from v1.2 to 2.0, but updates require old TAuthOwner and Password

I ran into this problem too. Here is what you do: Windows set the AuthOwner password and then discards, which is more secure. You have to change a registry key in order for Windows to save the password. So change the registry key restart clear the tpm , restart and then you can run the update. If you then want to change registry back to defaults, do that and restart, clear tpm and restart. "Although the TPM owner password is not retained starting with Windows 10, version 1607, or Windows 11, you can change a default registry key to retain it. However, we strongly recommend that you do not make this change. To retain the TPM owner password, set the registry key 'HKLM\Software\Policies\Microsoft\TPM' [REG_DWORD] 'OSManagedAuthLevel' to 4. The default value for this key is 2, and unless it is changed to 4 before the TPM is provisioned, the owner password will not be saved." from https://docs.microsoft.com/en-us/windows/security/information-protection/tpm/change-the-tpm-owner-password