Make sure they are both on the same network. http://windows.microsoft.com/en-US/w...a-home-network
Use a usb flash drive or an external drive to transfer files between machines, otherwise network the two computers together.
In order to use a network you need to:
1. Make sure your computers are connected to the same router or switch. If you have neither of these, use a crossover cableto connect the computers directly to each other.
2. Make sure both computers are in the same workgroup.
3. Make sure both computers have IP addresses on the same subnet.
4. Make sure file and printer sharing is turned on for both computers.