Which feature enhances security by notifying users of potential threats?

The feature that enhances security by notifying users of potential threats is Windows SmartScreen. This tool is designed to protect users from malicious websites, downloads, and applications. When a user attempts to visit a site or download a file that is considered suspicious or unsafe based on its reputation, Windows SmartScreen will provide a warning, helping to prevent potential threats before they can affect the system.

Windows SmartScreen works by checking URLs and files against a continuously updated database of known threats and patterns. If a match is found, it prompts the user with a warning, effectively serving as an early line of defense against phishing attacks and malware.

In contrast, while other options like Windows Defender offer robust antivirus protection and Windows Update ensures the operating system remains secure with the latest patches, it is Windows SmartScreen that specifically focuses on real-time, proactive notification of potential threats as users navigate the web or download files. This distinction makes it a crucial tool in enhancing user security against immediate and emerging risks.