How to Fix a Local Security Authority Protection Is Off Error on Windows 11

A hand icon pointing to "Security."

Have you encountered a “Local Security Authority protection is off. Your device may be vulnerable” error on your Windows 11 PC? If you have the security features turned on, this is a bug causing the error. Update your Windows system to get rid of the error, or simply dismiss it. Here’s more information.

Update Windows 11 to Get Rid of the Error

Several users on a Microsoft Community forum thread reported this bug after the update for the Microsoft Defender Antivirus antimalware platform (KB5007651). The good part was that Microsoft quickly resolved this, as they rolled out a new update soon with a patch for the Local Security Authority protection error. Here’s how to update your system and eliminate the error message.

Launch the Settings app by pressing Windows + I on your keyboard.

From the left side of the window, choose Windows Update. On the right side, click the Check for updates button. Fetching the updates can take some time, depending on your internet speed.

"Windows Update" and "Check for updates" highlighted in Windows 11 Settings.

If any updates are available, click the Download and install button next to them. Once the installation is complete, restart your PC to bring the changes into effect.

It’s Safe to Dismiss the Error

It’s alarming when you encounter a security-related error like local security authority protection is off. However, it’s safe to dismiss the error message as it’s caused by a system bug. Once you apply the update or Windows automatically installs the available updates, the error will go away.

Microsoft’s updates are designed to address security vulnerabilities, but it is important to stay vigilant and update your operating system consistently to ensure ongoing security. Even after installing updates, new vulnerabilities can be discovered, so it is important to be proactive and keep your system updated.