A computer system comprising: - a power supply unit to convert a primary supply voltage into at least one secondary operating voltage and at least one secondary standby voltage; - a system component comprising at least one processor; - a microcontroller and - a memory functionally connected to the microcontroller to store information about an interruption of at least one operating voltage of the computer system, wherein its memory content indicates if an interruption of the secondary operating and standby voltage was intended or if it is an unintended interruption of the secondary operation and standby voltage; wherein - the computer system is configured, in a first operating state, to supply the at least one processor with the at least one secondary operating voltage; - the computer system is furthermore configured, in a second operating state, to separate the at least one processor from the at least one secondary operating voltage and to supply the microcontroller with the at least one secondary standby voltage; - the computer system is furthermore configured, in a third operating state, to separate the at least one processor from the at least one secondary operating voltage and to separate the microcontroller from the at least one secondary standby voltage, and - the microcontroller is configured to read out the information about the interruption of the at least one operating voltage of the computer system from the memory when the at least one secondary standby voltage is applied to the microcontroller and, in the case of an intended interruption, to switch the computer system, dependent on the information readout, to the first operating state upon detection of a subsequent start-up signal and to perform a memory request in the case of an unintended interruption as to which operating state is to be assumed next. - a power supply unit to convert a primary supply voltage into at least one secondary operating voltage and at least one secondary standby voltage; - a system component comprising at least one processor; - a microcontroller and - a memory functionally connected to the microcontroller to store information about an interruption of at least one operating voltage of the computer system, wherein its memory content indicates if an interruption of the secondary operating and standby voltage was intended or if it is an unintended interruption of the secondary operation and standby voltage; - the computer system is configured, in a first operating state, to supply the at least one processor with the at least one secondary operating voltage; - the computer system is furthermore configured, in a second operating state, to separate the at least one processor from the at least one secondary operating voltage and to supply the microcontroller with the at least one secondary standby voltage; - the computer system is furthermore configured, in a third operating state, to separate the at least one processor from the at least one secondary operating voltage and to separate the microcontroller from the at least one secondary standby voltage, and - the microcontroller is configured to read out the information about the interruption of the at least one operating voltage of the computer system from the memory when the at least one secondary standby voltage is applied to the microcontroller and, in the case of an intended interruption, to switch the computer system, dependent on the information readout, to the first operating state upon detection of a subsequent start-up signal and to perform a memory request in the case of an unintended interruption as to which operating state is to be assumed next.