While an IP address is required for a network connection, a domain or workgroup also needs each computer to have a unique name. Since most network configurations will only accept recognized computers and devices, the name provides the network identification needed for connection establishment. Find the name of your computer from within the Windows Control Panel.
Click the "Start" button. Type "Computer Name" in the "Search programs and files" field, then press "Enter." This opens a Control Panel component called "System" in a new window on the screen.
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Locate the "Computer name, domain, and workgroup settings" section near the bottom of the screen. Your computer's name is listed next to "Full Computer Name."
Click the "Change settings" option, which is located on the right side of the "Computer name, domain, and workgroup settings" section. This opens a System Properties dialog. You can also find the name of the computer on this dialog by looking at the name listed next to "Full Computer Name." Continue reading if you want to change the name of your computer.
Click the "Change…" button located at the bottom. This opens a second small dialog. Type the newly desired name in the "Computer name" field and click the "OK" button at the bottom to save. This displays a dialog advising you must restart before changes take effect. Click the "OK" button to close this dialog.
Save any open work and click "Restart Now" to apply the changes.