How do I join an available homegroup?
During network setup, choose Home network from the list of network locations. The Join a HomeGroup wizard will start automatically, guiding you through choosing what you want to share and typing the homegroup password. If necessary, you can always access the HomeGroup password from any of the computers in the group. You can also Click Start, type homegroup, and then press ENTER to access the HomeGroup control panel. As long as you are on your home network, you will be able to join an available homegroup.