If the system is turning on and off normally and you are using the restart option from the operating system (Windows), it might be a situation with the OS.
When this problem starts, since day one? If not, I suggest a fresh operating system installation. If the problem persist after the new Windows installation, you could try to update the BIOS from the following link :
After that go to he BIOS and set the defaults with F9 then F10 to save&exit.