What is the function of User Account Control (UAC) in Windows?

User Account Control (UAC) serves an essential role in maintaining the security of the Windows operating system by informing users of program changes that require elevated permissions. When an application attempts to make changes that could affect the system or install software, UAC prompts the user to confirm or deny these actions. This mechanism is designed to prevent unauthorized changes, ensuring that only users with the appropriate privileges can execute sensitive functions.

By prompting for permission or a password when software or system changes are initiated, UAC helps to mitigate the risks posed by malware or unintentional user errors, protecting the integrity of the operating system and other users' data. It empowers users by giving them control over potentially harmful actions that could compromise security. This focus on user awareness and consent is crucial within a secure computing environment, making UAC a key feature in Windows security architecture.