I don't have a Homegroup setup and file sharing is turned off, and yet there are several items listed under "Network" in File Explorer.

My two other computers are always listed there, even when they are turned off.

I can even access and browse one of these computers (when it is turned on) without providing a password.

The name of the computer I am using is also listed there.

My name of my brother laser printer is listed there, but I cannot access it this way.

The name of my router is listed there but I cannot access it this.

How do I control what shows up in my Network?