hasta antes de ayer tenia todo configurado correctamente, cuando accedía a "Examinar la Red", me mostraba ahi nomas todos los equipos encontrados en la red local y una carpeta "Redes de Windows"
en la red de mi casa hay un Media Center en el cual mi hno yo ponemos peliculas y series o cargamos los subtítulos de algo cuando falta etc....

hoy instale gwakeanlan y wakeonlan para ver si podia prender el WDTVLiveHub para pasar una pelicula, para recopilar los datos necesarios instale el nast, una vez obtenidos los datos del WDTVLiveHub desinstale el nast y el wakeonlan y me quede con el gWakeonlan. antes la pc  actualizo un par de cosas de ubuntu Update, en ese mmento no me di cuenta pero en "Examinar la Red" faltan mi equipo y el de mi hno, solo aparece WDTVLiveHub.

aclaro que 15 minutos antes de hacer todo eso explicado arriba funcionaba y se visualizaba todo bien, mi equipo, el de mi hermano y el WDTVLiveHub y esa carpeta de Redes de Windows. ahora solo aparece WDTVLiveHub y esa carpeta "Redes de Windows"

por si alguno de esos programas o la actualizacion haya modificado el smb.conf, aca lo pongo:

[global]
 
## Browsing/Identification ###
 
# Change this to the workgroup/NT-domain name your Samba server will part of
	workgroup = intranet
#	netbios name = XKIZ-UBNT
	usershare owner only = false
 
# server string is the equivalent of the NT Description field
	server string = %h server (Samba, Ubuntu)
 
# Windows Internet Name Serving Support Section:
# WINS Support - Tells the NMBD component of Samba to enable its WINS Server
;	wins support = yes
 
# WINS Server - Tells the NMBD components of Samba to be a WINS Client
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
;   wins server = w.x.y.z
 
# This will prevent nmbd to search for NetBIOS names through DNS.
;   dns proxy = no
 
# What naming service and in what order should we use to resolve host names
# to IP addresses
;   name resolve order = lmhosts host wins bcast
 
#### Networking ####
 
# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
;   interfaces = 127.0.0.0/8 eth0
 
# Only bind to the named interfaces and/or networks; you must use the
# 'interfaces' option above to use this.
# It is recommended that you enable this feature if your Samba machine is
# not protected by a firewall or is a firewall itself.  However, this
# option cannot handle dynamic or non-broadcast interfaces correctly.
;   bind interfaces only = yes
 
 
 
#### Debugging/Accounting ####
 
# This tells Samba to use a separate log file for each machine
# that connects
	log file = /var/log/samba/log.%m
 
# Cap the size of the individual log files (in KiB).
	max log size = 1000
 
# If you want Samba to only log through syslog then set the following
# parameter to 'yes'.
#   syslog only = no
 
# We want Samba to log a minimum amount of information to syslog. Everything
# should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log
# through syslog you should set the following parameter to something higher.
	syslog = 0
 
# Do something sensible when Samba crashes: mail the admin a backtrace
	panic action = /usr/share/samba/panic-action %d
 
 
####### Authentication #######
 
# "security = user" is always a good idea. This will require a Unix account
# in this server for every user accessing the server. See
# /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/ServerType.html
# in the samba-doc package for details.
#   security = user
 
# You may wish to use password encryption.  See the section on
# 'encrypt passwords' in the smb.conf(5) manpage before enabling.
	encrypt passwords = no
 
# If you are using encrypted passwords, Samba will need to know what
# password database type you are using.  
;	passdb backend = tdbsam
 
	obey pam restrictions = yes
 
# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
	unix password sync = yes
 
# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Ian Kahan <<kahan@informatik.tu-muenchen.de> for
# sending the correct chat script for the passwd program in Debian Sarge).
	passwd program = /usr/bin/passwd %u
	passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
 
# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# 'passwd program'. The default is 'no'.
	pam password change = yes
 
# This option controls how unsuccessful authentication attempts are mapped
# to anonymous connections
	map to guest = bad user
 
########## Domains ###########
 
# Is this machine able to authenticate users. Both PDC and BDC
# must have this setting enabled. If you are the BDC you must
# change the 'domain master' setting to no
#
;   domain logons = yes
#
# The following setting only takes effect if 'domain logons' is set
# It specifies the location of the user's profile directory
# from the client point of view)
# The following required a [profiles] share to be setup on the
# samba server (see below)
;   logon path = \\%N\profiles\%U
# Another common choice is storing the profile in the user's home directory
# (this is Samba's default)
#   logon path = \\%N\%U\profile
 
# The following setting only takes effect if 'domain logons' is set
# It specifies the location of a user's home directory (from the client
# point of view)
;   logon drive = H:
#   logon home = \\%N\%U
 
# The following setting only takes effect if 'domain logons' is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in 'DOS' file format convention
;   logon script = logon.cmd
 
# This allows Unix users to be created on the domain controller via the SAMR
# RPC pipe.  The example command creates a user account with a disabled Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u
 
# This allows machine accounts to be created on the domain controller via the 
# SAMR RPC pipe.  
# The following assumes a "machines" group exists on the system
; add machine script  = /usr/sbin/useradd -g machines -c "%u machine account" -d /var/lib/samba -s /bin/false %u
 
# This allows Unix groups to be created on the domain controller via the SAMR
# RPC pipe.  
; add group script = /usr/sbin/addgroup --force-badname %g
 
########## Printing ##########
 
# If you want to automatically load your printer list rather
# than setting them up individually then you'll need this
#   load printers = yes
 
# lpr(ng) printing. You may wish to override the location of the
# printcap file
;   printing = bsd
;   printcap name = /etc/printcap
 
# CUPS printing.  See also the cupsaddsmb(8) manpage in the
# cupsys-client package.
;	printing = cups
;   printcap name = cups
 
############ Misc ############
 
# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
;   include = /home/samba/etc/smb.conf.%m
 
# Most people will find that this option gives better performance.
# See smb.conf(5) and /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/speed.html
# for details
# You may want to add the following on a Linux system:
#         SO_RCVBUF=8192 SO_SNDBUF=8192
#   socket options = TCP_NODELAY
 
# The following parameter is useful only if you have the linpopup package
# installed. The samba maintainer and the linpopup maintainer are
# working to ease installation and configuration of linpopup and samba.
;   message command = /bin/sh -c '/usr/bin/linpopup "%f" "%m" %s; rm %s' &
 
# Domain Master specifies Samba to be the Domain Master Browser. If this
# machine will be configured as a BDC (a secondary logon server), you
# must set this to 'no'; otherwise, the default behavior is recommended.
#   domain master = auto
 
# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
;   idmap uid = 10000-20000
;   idmap gid = 10000-20000
;   template shell = /bin/bash
 
# The following was the default behaviour in sarge,
# but samba upstream reverted the default because it might induce
# performance issues in large organizations.
# See Debian bug #368251 for some of the consequences of *not*
# having this setting and smb.conf(5) for details.
;   winbind enum groups = yes
;   winbind enum users = yes
 
# Setup usershare options to enable non-root users to share folders
# with the net usershare command.
 
# Maximum number of usershare. 0 (default) means that usershare is disabled.
;	usershare max shares = 100
 
# Allow users who've been granted usershare privileges to create
# public shares, not just authenticated ones
	usershare allow guests = yes
	security = share
;	guest ok = no
;	guest account = nobody
 
#======================= Share Definitions =======================
 
# Un-comment the following (and tweak the other settings below to suit)
# to enable the default home directory shares. This will share each 
# user's home director as \\server\username
;[homes]
;   comment = Home Directories
;   browseable = no
 
# By default, the home directories are exported read-only. Change the
# next parameter to 'no' if you want to be able to write to them.
;   read only = yes
 
# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
;   create mask = 0700
 
# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
;   directory mask = 0700
 
# By default, \\server\username shares can be connected to by anyone
# with access to the samba server. Un-comment the following parameter
# to make sure that only "username" can connect to \\server\username
# The following parameter makes sure that only "username" can connect
#
# This might need tweaking when using external authentication schemes
;   valid users = %S
 

Osea lo que necesito es que aparezcan los 3 equipos en red