HomeGroups let you easily link Windows 7 computers on your home network to share pictures, music, videos, documents and devices such as a printer. In order to set up a HomeGroup, a user's Network Location needs to be set as "Home" in the Network and Sharing Center. When you create a HomeGroup, you specify which media files, folders and devices you want to share, and create a password so that only people with that password can join the HomeGroup.
See related stories
Windows 7 Upgrade FAQ
Windows 7: Five Unique Features
Window Tips: Windows 7 Shortcuts and More