|If you don't have a SOHO Router in your home network to provide TCP/IP settings to the two computers you'll have to do it manually.|
On both PC's you want to access the properties for the network interface and in the properties for "Internet Protocol (TCP/IP)" you'll want to statically apply the following settings: ("Use the following IP address:")
Subnet Mask: 255.255.255.0
Now you should be able to communicate with each other. Once you have the two communicating, then you can share. It's likely best to create a shared folder on one PC and connect to it from the other. For info on how to setup permissions on a share so as to make access as easy as possible simply click on my name above in this response and read my “how-to” guide titled, “You try to connect to a share but are asked for a Username/Password”
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.