THIS MODULE IS BLOCKED FROM LOADIN G INTO THE LOCAL SECURITY AUTHORITY

Question

THIS MODULE IS BLOCKED FROM LOADIN G INTO THE LOCAL SECURITY AUTHORITY HOW DO I CORRECT IT?

Answer 1

Dear Ron D,

Thank you for giving your question to us.

The message indicates that LSA Protection (Local Security Authority Protection) has prevented a specific module, typically a .dll file, from loading into the lsass.exe process because it is not digitally signed by Microsoft or does not meet the necessary security requirements.

To provide the most accurate guidance, I would appreciate it if you could clarify a few details regarding your situation:

Which module is mentioned? Does the notification provide a file name (e.g., mdnsNSP.dll, crypt64.dll) or a specific file path?

When did this begin? Did the error appear immediately after a Windows Update, or after installing a third-party application (such as iTunes, Adobe Creative Cloud, or an Antivirus)?

• What is your current OS version? (e.g., Windows 11 Pro 23H2).

Answer 2

"THIS MODULE IS BLOCKED FROM LOADING INTO THE LOCAL SECURITY AUTHORITY" is related to Local Security Authority (LSA) protection, a Windows security feature that prevents untrusted or incompatible code from loading into the LSA process.

To correct it, use the Windows Security app to review and adjust LSA protection:

1. Open Windows Security from Start.
2. Go to Device security.
3. Under Core isolation, select Core isolation details.
4. Locate Local Security Authority protection.
5. If a specific module is being blocked and is required, either:
   • Remove or update the incompatible software that installs that module so it is compatible with LSA protection, or
   • Turn Local Security Authority protection Off (not recommended) using the toggle, then restart the device for the change to take effect.

Turning LSA protection off reduces protection for credentials and should only be done if absolutely necessary and after confirming the blocked module is from trusted, up-to-date software.

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References:

• Device Security in the Windows Security App
• Credentials processes in Windows authentication