How to isolate a PC on a local network?

Question

Windows

Hello! Please tell me - there is a router with the Internet and a local network of 5-7 computers. How to make sure that one of the computers does not see its "neighbors" on the network and does not have access to them?

Answer 1

VLAN - many even cheap home routers can have a
different subnet
rules on the router

Answer 2

Well, can this be done with the help of a router?
if the router was in the form of a computer with freebsd / linux - then you can

Answer 3

And if on this computer to close all ports except for holes. internet work?