In my house we have a network. Everyone and the internet is plugged into the router. There is one computer whom the router does not recognise although that computer does still have access to the internet and the shared folders of all other computers. The other computers, however, cannot ping that computer.

Anyone know what is going on or how to resolve the situation?

Hi Matthew,

I'm not a network expert, so this might be bollocks, but I had a similar problem at w**k last week. I know there are a million and one different ways to configure your network, so its a bit of a long shot, but here goes anyway.

I had a computer that could see everyone else, but no-one could see it. Our IP addresses are assigned by our server, so I was pinging it by the PC's name, and was getting the destination unreachable message.

When I pinged that machine from itself, I noticed it was bringing up a different IP address to when I was pinging it from the other machines.

I told our network guy about this, and he said that there was a mistake in the configuration on the primary domain controller. It contains a list of names and corresponding IP addresses somewhere, and the IP it held for this machine was wrong. So, other networked PC's couldn't see it because they were looking in the wrong place.

There used to be a file called LMHOSTS (no extension) on older OS, that used to do this kind thing, but I think it might be done by windows somewhere now. Not sure where exactly. Defintely don't know where to look if its done by the router though.