A few days ago, Microsoft announced that Windows 11 is undergoing an agentic overhaul. The company indirectly warned that security vulnerabilities may be exposed, and today they issued an updated notice. "As these capabilities are introduced, AI models still face functional limitations in terms of how they behave and occasionally may hallucinate and produce unexpected outputs." After installing Windows 11 Build 26220.7262, you'll find a new toggle for "Experimental agentic features" in Settings > System under "AI Components." Fortunately, this is an optional feature and must be enabled manually.

Upon turning the feature on, Windows will show a warning that these capabilities are experimental and might affect your device. In practice the security risk is the bigger concern. New attack techniques tied to autonomous agents are already appearing, with cross-prompt injection standing out. In those attacks, malicious instructions are concealed inside ordinary documents or interface elements so an agent follows them instead of its original task. That could allow an agent to install malware, leak payment details, or carry out other harmful actions.
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