User Account Control (UAC) in Windows 11 is a fundamental security component designed to prevent unauthorized, silent changes to the operating system . It operates by running most applications with standard user permissions, even if you are logged in as an administrator, requiring explicit elevation for tasks that affect system stability or security. Microsoft Learn +2 How UAC Works in Windows 11 Elevation Prompt: When an application, script, or installer attempts to perform an administrative task (e.g., modifying system files, installing drivers, changing registry keys), UAC interrupts it and presents a prompt. The "Secure Desktop": By default, when a prompt appears, Windows 11 switches to a "secure desktop" (the screen dims). This environment is isolated, ensuring that malware cannot simulate clicks or interact with the prompt. Color-Coded Alerts: Prompts are color-coded based on the publisher's certificate: Blue/Gold: Trusted apps (digitally signed by Windows or a trusted publisher). Yellow: Unknown or unsigned apps. Red: Blocked apps or apps with invalid signatures. Microsoft Learn +4 UAC Notification Levels (Settings Slider) You can adjust UAC behavior in the Control Panel by searching for "UAC" and selecting "Change User Account Control settings". YouTube +1 Always Notify (Highest): Prompts for every change (apps or Windows settings). Default (Notify only when apps try to make changes): Prompts when apps request elevation, but not for user-initiated Windows settings changes.
The UAC dialog now matches Windows 11’s rounded-corner, acrylic UI, but the functional flow remains identical. uac windows 11