Ludovic
Hello there,
Please repeatedly press delete key as soon as you turn on the PC, go to BIOS. Please send us a picture of the Main page, we will check if you need to update the BIOS.
I’m sorry that the SER5 MAX 6800 machine cannot disable USB ports when the PC is turned off
Our machine has a wake on lan function, if the machine is completely powered off, this function will not work properly.
Therefore, when the machine is connected to the power supply, even if it is turned off, the external interface of the machine will have electricity.
Have a nice day~