My Network Place take long time to see other computer or share

I need help.
We have a peer to peer network here in our company, for some reason, my boss computer
have issue when he open My Network Place and it take like 30 sec or more to
be able to display other computers or shared document on the network.
My computer or other don't have that issue. We have about 18 PC on the network.
Anyone have a clue why it take long time to be able to see other computer/share
on the network place? I check all the setting, firewall, anti-viruses, etc. but
couldn't find the problem. I guess it laying somewhere in the operating system.
We use Windows XP.

Thank in advance,

BSDME2

 

Try here and here.

 

Thanks,

I will check out those link.