Which feature should you use to install the most recent definitions for Windows Defender?

Windows Update serves as the central mechanism for distributing security intelligence updates, including the latest virus and spyware definitions for Windows Defender Antivirus. These regular updates are critical to ensure that Windows Defender can effectively detect and protect against new and evolving malware threats.

Sync Center is used for synchronizing files between your computer and network locations or specific programs, not for updating security definitions.

Windows Installer is a component used for the installation, maintenance, and removal of software applications, not for updating anti-malware definitions.

Programs and Features (or Apps & features) is used to manage installed applications, such as uninstalling or changing them, rather than updating security definitions.