In this post, you’ll learn more about the Error FVE_E_SYSTEM_VOLUME – 0x80310012 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
FVE_E_SYSTEM_VOLUME – 0x80310012
Win32 COM Error Error Description
The drive cannot be encrypted because it contains system boot information. Create a separate partition for use as the system drive that contains the boot information and a second partition for use as the operating system drive and then encrypt the operating system drive.