You can join a homegroup in any edition of Windows 7, but you can only create one in Home Premium, Professional, Ultimate, or Enterprise.
Plan to use your PC at the office—or for telecommuting? Then you might need to connect to a domain, which is a collection of computers on a network. The Windows 7 Professional, Ultimate, and Enterprise editions are designed to join a domain quickly and more securely. Just follow the easy-to-use wizard, which prompts you to enter your network credentials. A few moments later, you're in business.
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