Which of the following locations would a technician use to add a Windows 7 computer to a domain?

System Properties (accessed by right-clicking Computer and selecting Properties, then 'Change settings') contains the Computer Name tab where a technician can click 'Change' to join the computer to a domain. This is the authoritative location in Windows 7 for domain and workgroup membership configuration.

Windows Defender is a security and anti-malware tool and does not contain any settings for joining a computer to a domain.

Network and Sharing Center manages network adapter settings, sharing options, and firewall profiles but does not provide domain join functionality.

Device Manager is used to manage hardware drivers and devices and has no role in configuring domain membership.