I dislike Microsoft's obsession with "We'll do it all for you" Wizards. My big annoyance with them is that they do not tell you what they have done.
With networking, all you need to do is go in via Control Panel and find the section which sets the name of the computer ("System" 0n my computer) which brings up a multi tab "System Properties", one tab being "Computer Name" This tab has a button which allows you give the computer a network "Workgroup" and give the computer an individual name to be used by the network.
To do this, you don't need to run Microsoft's wizards at all.
Quack!
GtD.