# Windows 11 Update Bug Disables Smart App Control Security Feature A recent Patch Tuesday update inadvertently prevents users from enabling critical Smart App Control protections. - **Source:** [Latest news](https://brifing.si/source/77d15218-219f-472d-bf40-31b5646d2942) - **Published:** 2026-10-20 - **Topic:** [Software & Engineering](https://brifing.si/c/engineering) - **Original article:** - **On Brifing:** https://brifing.si/s/c67e2a4c-bb98-4970-b9e4-45986a030067 ## Update Triggers Security Glitch The October 13 Patch Tuesday update for Windows 11 introduced a bug affecting the Smart App Control feature. This security mechanism, introduced in 2022, is designed to block malicious files and emerging threats. Users who have not already enabled the feature find the activation button grayed out after installing the latest update. ## Verifying System Vulnerability Status To determine if your system is affected, navigate to Settings, select Privacy & Security, and open Windows Security. Within the App & browser control section, check the Smart App Control settings. If the option is set to Off and the toggle is unresponsive, your machine has been impacted by this specific update bug. ## Registry Modification Workaround Required Microsoft is currently developing a permanent fix for this issue to be released in a future update. Until then, users can restore functionality by manually adding two specific keys to the Windows Registry. This process requires administrative privileges to modify system policies and successfully re-enable the restricted security feature on affected machines. ## Executing Command Prompt Fixes Open the command prompt as an administrator to begin the manual override process. You must execute two specific reg add commands targeting the FeatureManagement Overrides path. Each command requires precise syntax to ensure the registry updates correctly. After running both commands, a system reboot is necessary to apply the changes and restore access. ## Verifying Successful Policy Restoration Once the system reboots, navigate back to the Smart App Control settings menu to confirm the fix. The On option should now be available for selection, allowing you to reactivate the protection. If the commands were executed successfully, the interface will no longer display the grayed-out, inaccessible state caused by the update. ## Smart App Control Utility Analysis Smart App Control serves as a robust defense layer against unknown malware and suspicious software. While it provides significant security benefits, it may occasionally interfere with legitimate software installations from unfamiliar sources. Users should evaluate their specific workflow requirements before deciding whether to keep this protective feature permanently enabled or disabled. ## Risk Management for Users Maintaining active security settings is critical for defending against evolving cyber threats. The current bug highlights the importance of monitoring system behavior after mandatory monthly updates. Users who frequently download files from diverse sources should prioritize re-enabling this feature to ensure their operating system remains protected against potential malicious software infections. ## Future Patch Expectations Microsoft has acknowledged the glitch and confirmed that a future release will address the underlying cause. Until that patch arrives, the provided registry workaround remains the only official method to regain control over the security setting. Users should remain vigilant for upcoming Windows updates that will eventually resolve this specific issue. ## Sources covering this story - https://www.zdnet.com/tech/microsoft-october-windows-update-disables-security-setting-workaround/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._