Why is lan disconnected?

Question

Computer networks

The bottom line is this, when you turn on the Internet via lan, it turns off after 2 minutes. The theme with turning off energy saving for the network does not work.
There are some solutions with ipv6 redirection, but something is left garbage, it seems to me, tell me some other ways, I don’t want to reinstall Windows. I also reinstalled the drivers, too -

Answer 1

It would also be worth checking the switch, cable, connectors.