In this post, you’ll learn more about the Error FVE_E_TPM_NOT_OWNED – 0x80310018 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
FVE_E_TPM_NOT_OWNED – 0x80310018
Win32 COM Error Error Description
You must initialize the Trusted Platform Module (TPM) before you can use BitLocker Drive Encryption.