How to Fix "Local Security Authority Protection is OFF" Error on Windows?

Local Security Authority Protection is OFF

If You've encountered a "Local Security Authority Protection is Off" error on your Windows device. Don't panic! While this warning signals a significant security vulnerability, fixing it is often straightforward. This comprehensive guide delves into the implications of this issue and provides practical steps to secure your system effectively.

What is Local Security Authority Protection (LSA)?

The Local Security Authority (LSA) is a vital Windows component responsible for authenticating users and managing their access to various resources. Its protection is paramount in maintaining the security of your system. If you encounter the message "Local Security Authority Protection is Off," it indicates a potential security breach and requires immediate attention. 

How LSA Protection Works?

LSA Protection operates by implementing a dual-factor authentication mechanism for accessing LSA-related data and performing security-sensitive operations. It combines a password-based authentication layer with a Policy-Based Access Control (PBAC) layer. The PBAC layer governs access rights and permissions for various security-related tasks, ensuring that only authorized users or processes can modify security settings or perform privileged operations.

Why Do I See This Error?

Several factors can trigger this error:

  1. Recent Windows updates: Specific updates, like KB5007651, might temporarily disable LSA protection due to bugs.
  2. Malware infection: Malicious software can disable security features to gain control of your system.
  3. Conflicting security software: Third-party antivirus programs might clash with Windows Defender, causing conflicts.
  4. Corrupted system files: Damaged system files can disrupt critical security settings.
  5. Manual disabling (rare): In rare cases, users might unintentionally disable LSA protection.

Symptoms of a Vulnerable Device:

While the error message itself is a clear indicator, other signs include:
  1. Increased susceptibility to malware and phishing attacks.
  2. Difficulty logging in or using certain system features.
  3. Performance issues (in some cases).

How to Fix the "Local Security Authority Protection is OFF" Error?

Don't let the error message intimidate you! Here's how to reactivate LSA protection and secure your device:

1. Check Core Isolation Settings:

  1. Open the Windows Security app.
  2. Go to Device Security> Core isolation.
  3. Ensure Memory integrity and Credential Guard are turned on.
  4. Restart your device for the changes to take effect.

2. Run a Full System Scan:

  1. Use Windows Defender or a reputable antivirus to perform a thorough system scan.
  2. Quarantine or remove any detected threats.

3. Temporarily Disable Third-Party Security Software:

  1. If the issue persists, temporarily disable any third-party antivirus or security software.
  2. Re-enable it after resolving the LSA issue.

4. Advanced Fixes (Proceed with Caution):

  1. System File Checker (SFC) and Deployment Image Servicing and Management (DISM) scans: These tools can repair corrupted system files. However, proceed with caution and follow expert guidance if needed.
  2. Registry Editor fixes: Editing the registry can be risky. Only attempt this with expert assistance and after backing up your registry.
Remember to restart your device after each step!

Proactive measures are key to avoiding this issue in the future:

  • Keep Windows and security software updated.
  • Use strong passwords and enable multi-factor authentication.
  • Be cautious about opening suspicious emails or clicking unknown links.
  • Invest in a reputable antivirus/antimalware solution.
  • Regularly back up your data.
Stay Secure, Stay Informed:

By understanding the "Local Security Authority Protection is Off" error and taking the necessary steps to fix it, you can significantly bolster your device's defenses. Remember, cybersecurity is an ongoing process. Stay informed about emerging threats and adopt best practices to keep your data and privacy safe.


Maintaining the security of your system is crucial for protecting sensitive information and preventing unauthorized access. If you encounter the "Local Security Authority Protection is Off" error, it's imperative to take immediate action to re-enable LSA protection and implement additional security measures. By following the steps outlined in this guide, you can secure your system effectively and mitigate the risks associated with this vulnerability. Remember, ongoing vigilance and proactive security practices are essential to safeguarding your system against potential threats.

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