Microsoft Update Breaks Windows 11 Security — Here's the Fix

Microsoft's latest monthly update for Windows 11, released on October 13, has a bug that disables Smart App Control, a security feature that helps block malicious apps and files. This means your computer could be more susceptible to viruses and other threats. Smart App Control, introduced in 2022, is stricter than other built-in protections and is designed to stop new and emerging malware. With it turned off, you're missing an important layer of defense.

To see if you're affected, open Windows Security settings and check Smart App Control. If it's set to Off and the On option is grayed out, the bug has hit you. Microsoft says it's working on a permanent fix, but in the meantime, you can restore the setting by adding two keys to the Windows Registry. This involves running a couple of commands in the Command Prompt as an administrator. Full instructions are provided, but be careful: modifying the Registry can be risky if you're not comfortable with technical steps.

Once you've added the keys and rebooted your PC, you should be able to turn Smart App Control back on. Microsoft recommends enabling it for better protection, though it may occasionally block apps you trust. If that happens, you can always turn it off again. For most people, the extra security is worth the minor inconvenience. Keeping your PC safe from malware is especially important as cyber threats continue to grow.