Networking features in Windows 7 address a number of problems that arise from the use of corporate PCs on noncorporate networks, particularly by workers who take their laptops home after work and on weekends. If you've ever spent hours trying to print on a networked home printer from a laptop tied to a corporate domain, you'll appreciate the W7-given ability to associate your notebook with a HomeGroup for easy access to printers and files on other PCs--without any tinkering with your IT department's carefully applied domain configuration settings. We haven't tested this capability yet, but Microsoft says that HomeGroup will also prevent other PCs on your home network from accessing any of the (potentially sensitive) corporate data on your laptop.
But wait: There's more. Microsoft says that Windows 7 will be smart enough to recognize when you're at home and when you're at your office. As a result, if you print a document, the OS will choose the appropriate printer to use. And a new federated search capability will let you sift through files on PCs across the network, and apply filters to your results. This means that you can do a keyword search and then refine it by specifying a specific file type.
Windows 7 promises easier Wi-Fi network and Bluetooth peripheral setup, too, though we weren't able to test either on the early beta software. Hovering over the Taskbar icon for these network adapters produces a jump list of available networks (or devices, in the case of Bluetooth); then you merely click the one you want to connect to (or pair with, in the case of a Bluetooth peripheral).
Another improvement is wake-on-wireless-LAN, the ability to bring a Wi-Fi-connected PC out of sleep mode remotely (just as you've long been able to do with ethernet-connected systems).
Back at the office, other networking improvements only apply if your company installs Windows Server 2008 R2 and your IT department allows them. For example, you might be able to click a link in a corporate e-mail message to launch an application behind the firewall--without having to make a VPN connection first (Windows 7 will transparently handle the security arrangements).
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