Two are wireless and one is plugged into wireless router which is plugged into a cable modem. All three have an internet connection that works. All three have printer and file sharing enabled. A=Sony Vaio wireless; B=Dell Latitude Wireless; C= Dell Dimension plugged in.
The Sony and the other two share file in both directions. The two Dells don't communicate at all. How can this be?
The Vaio and the Dimension have XP Pro the Latitude has XP Home.