Okay, so wee have 3 computers at our house wee want connected on a network:

A: Main computer, desktop, wired internet.
B: Secondary computer, desktop, wired internet
C: Secondary computer, laptop, wireless internet.

What wee want to do is make sure all of the computers can access each others files in the shared documents folder. Here's what happens.

A: Can access it's own shared docs. Only sees its own shared docs When it searches for computers, it sees itself and C.
B: Can access its own shared docs. When searches for computers, only sees itself. Can not access A's shared docs, but does see them.
C: Does not have shared docs. Can access A's shared docs, but can't see B.

How can wee get them all on the network?