Error 0x803100C1

Value: -2144272191 | 0x803100C1 | 2150695105

What does it mean ?

FVE_E_PASSPHRASE_PROTECTOR_CHANGE_BY_STD_USER_DISALLOWED  
You must be logged on with an administrator account to change the password. Click the link to reset the password as an administrator.
Value: 193 | 0x00C1 | 0b0000000011000001

Where does it come from ?

FACILITY_FVE  
Full volume encryption
Value: 49 | 0x031 | 0b00110001

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