Microsoft has made enhancements to both firewalling and networking in Windows 7.
There are now three firewall profiles: public network, home network and work network.
What’s great about the home network setting HomeGroup is you can automatically share pictures, videos, documents and printers by connecting two or more PCs running Windows 7 at home. File sharing is password-protected for privacy and there’s a read-only control to prevent others from making unwanted changes.
The combination of Windows 7 firewall and HomeGroup makes for a safe and useful home network. And, if you're a work network user, you'll appreciate that, unlike with Vista or XP, you can now run two firewall profiles at the same time. So, for example, you can let your kids access the video on your laptop via HomeGroup media-sharing on your home network connection, while keeping the latest spreadsheet from the business server safe from view on your work network VPN (Virtual Private Network) connection.