In this post, you’ll learn more about the Error FVE_E_DE_PROTECTION_SUSPENDED – 0x803100C8 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
FVE_E_DE_PROTECTION_SUSPENDED – 0x803100C8
Win32 COM Error Error Description
Protection is enabled on the volume but has been suspended. This is likely to have happened due to an update being applied to your system. Please try again after a reboot.