|Ok, if I'm reading this correctly........you have two PC's plugged into a switch and both have connectivity. One can be "seen" on the network by other computers (A) and the other PC (B) can't be "seen" on the network by other computers.|
If this is correct, first check that B has the exact same workgroup name as all other computers on the network. Then, check to ensure it's built in firewall isn't preventing this. Chances are, it's the firewall stopping it from replying to pings.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.