Why is there no connection, but the Internet is loading?

Question

Windows

I put the computer after a summer hibernation, connected the LAN, I watched the reaction of the computer: it determined the connection for 2 seconds, a healthy connection hung for a second, then the icon shows the absence of a cable. Looked network connection - it is active. I opened Google - everything loads fine, but the computer is not visible on the local network and does not see anyone. How can this problem be solved?