Unidentified Network

I'm stuck with computers that I've upgraded to windows 7 and connected them with wires to the network. They come up with unidentified Network (Public network). I want this to change to home network so I can share file with the other computers. All my computers in the house have manually asighned IP Adresses.

As for this unidentified Network (Public network) is there anyway to just pull that option out of the OS or delete it, Why do we need it, it just causes problems.

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