What is Smart App Control?
Smart App Control is a security feature in Windows 11 designed to block untrusted or potentially dangerous applications from running on a PC. Built directly into the operating system (through Windows Security), SAC leverages code signing, Microsoft’s intelligence cloud, and artificial intelligence to make real-time decisions about whether an app or application should be allowed to run. Its goal is to minimize the risk that malware, ransomware, and unwanted software could run on users’ systems — with minimal user intervention.
At its heart, Smart App Control is a kind of gatekeeper. When you attempt to run an app, SAC evaluates its trustworthiness. That evaluation is based on numerous criteria: Is the app digitally signed? Is it widely used and recognized as safe by Microsoft’s threat intelligence network? Has it been flagged previously for questionable behavior?
If an app fails one or more such checks and is found suspicious or untrustworthy, SAC blocks its execution, silently preventing a potential security event before it starts.
How does Smart App Control work?
SAC operates using a combination of cloud-based intelligence, local analysis, and digital signatures. Here’s a step-by-step breakdown of how it functions:
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