When a Shenzhou desktop computer automatically restarts when shutting down normally, it is usually due to a problem with the motherboard power management. The power management components of some motherboards do not respond very accurately to level signals due to the influence of wiring design and component quality. Since an instantaneous high voltage is generated when the motherboard cuts off the power supply, this high voltage exists for a short time and causes minimal damage to the hardware, but it usually causes PCI devices such as network cards and modems to generate a tiny pulse. If it is not judged as a noise signal and the automatic wake-up function is turned on in the motherboard BIOS, the motherboard will detect external connection requests from devices such as network cards and automatically turn on the computer. This reason is caused by hardware, so simply refreshing the motherboard BI0S cannot solve the problem. You can try turning off the automatic wake-up function in the motherboard BIOS.