fixed 1) sudo gedit /etc/nsswitch.conf 2) Look for this line: hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4 3) Add "wins" so it looks like this: hosts: files mdns4_minimal [NOTFOUND= return] wins dns mdns4 4) Install the "winbind" package: sudo apt-get install winbind (or via software center or synaptic) 5) Reboot or restart your network