A computer system includes a power supply unit, a system component including at least one processor, a microcontroller and a memory functionally connected to the microcontroller and stores information relating to an interruption in at least one operating voltage of the computer system. When at least one secondary standby voltage is applied to the microcontroller and the information relating to an interruption in the primary supply voltage of the computer system is read from the memory, the microcontroller is configured to selectively switch the computer system to a first operating state on the basis of the information which has been read.