If the computer always restarts for no reason, you can rule out the cause of the virus and check if there is a problem with the power supply. So how to check the health status of computer power supplies? If the cause of the virus is ruled out, you should focus on whether it is caused by poor heat dissipation of the CPU, graphics card, etc. CPU overheating protection will also automatically restart. It is easy to check the power supply. First, disconnect the host power supply, unplug the power plug connected to the motherboard, and use a thin wire to plug one end into the green wire hole and the other end into any black wire hole. Then connect the power supply. If the fan rotates and there are no other abnormalities, it indicates that the power supply is basically fine.