Can't see local computers

[chicagotech]

The following links mention firewall and ports regarding NetBIOS over TCP/IP. Try to disable all firewall and security software. Do you have NetBIOS over TCP/IP enabled after that?

NetBIOS and WINS
However, you may be in a situation that enabling netbios over tcp/ip doesn't work, but loading netbeui solve the name resolution problem. ...
www.chicagotech.net/netbios&wins.htm

NetBIOS over TCP/IP Overview
NetBT uses the following ports: NetBIOS session traffic over TCP port 139
http://www.chicagotech.net/tcpipissues/netbt.htm