typedef enum _USER_ACTIVITY_PRESENCE                                            // 5 elements; 0x0004 Bytes
{
    PowerUserPresent                = 0,
    PowerUserNotPresent             = 1,
    PowerUserInactive               = 2,
    PowerUserMaximum                = 3,
    PowerUserInvalid                = 3
} USER_ACTIVITY_PRESENCE, * PUSER_ACTIVITY_PRESENCE;

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