What does Windows Update do?

Windows Update is a critical feature of the Windows operating system that is responsible for downloading and installing system and security updates. These updates are essential for maintaining the health, security, and performance of a computer.

The primary function of Windows Update is to ensure that the operating system has the latest patches, which can fix vulnerabilities that may be exploited by malware or attackers. Security updates protect the system from potential threats, while system updates can enhance functionality and fix bugs that affect system stability and performance. By regularly applying these updates, users can help safeguard their devices against newly discovered vulnerabilities and ensure they are benefiting from the latest features and enhancements provided by Microsoft.

Other functionalities listed in the options do not relate to the core purpose of Windows Update. For instance, improvements in boot time, internet connection quality, or user account management are handled through different features or optimization tools within the operating system, rather than through the update mechanism that Windows Update provides.