Fix This Module Is Blocked from Loading into LSA

After upgrading Windows 11 24H2, you encounter an error "This module prevents loading to local security agency (mdnsNSP.dll)"? This article provides several solutions.

Local Security Agency (LSA) protection is a security feature of Windows that helps prevent credentials used to log in to Windows. Many users receive the following error message after a fresh installation of Windows 11 24H2 and the latest version of iTunes:

This module prevents loading to the local security authority.

\Device\HarddiskVolume3\Program Files\Bonjour\mdnsNSP.dll

For data security, in addition to the security features that come with Windows, it is crucial to back up data regularly, and virus attacks may lead to data loss. PC backup software such as MiniTool ShadowMaker can help you back up data and create system images to restore lost files or restore your PC to its previous state when the system crashes.

Here are a few ways to fix the "This module prevents loading to local security agency (mdnsNSP.dll)" error:

Method 1: Delete the problematic registry key

You can delete the problematic registry key through the Registry Editor:

1. Press Windows R to open the Run dialog box, enter regedit and press Enter .

2. Navigate to:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\NameSpace_Catalog5\Catalog_Entries

3. Find mdnsNSP.dll in the Data field.

4. Right-click the entry in question and select Delete .

Method 2: Reinstall Bonjour

If you use an Apple product, this error may be due to Apple's Bonjour service:

1. Press Windows X and select Apps and Features .

2. Find Bonjour and select it, and click Uninstall .

3. Download the latest version from Apple's support website.

4. Install it and restart your computer.

Method 3: Run SFC and DISM

Corrupted system files can cause multiple issues, including "iTunes Bonjour (mdnsNSP.dll) blocks loading to local security agencies". You can run SFC and DISM scans:

1. Type cmd in the Search box and select Run as administrator .

2. Type sfc /scannow and press Enter to run the SFC scan.

3. Then, restart your computer and run the command prompt again.

4. Type the following commands and press Enter after each command.

• DISM /Online /Cleanup-Image /CheckHealth
• DISM /Online /Cleanup-Image /ScanHealth
• DISM /Online /Cleanup-Image /RestoreHealth

When done, restart the computer to see if the error disappears.

Method 4: Perform a clean startup

The "This module prevents loading to local security agencies" error may also be caused by a conflicting program. So you can perform a clean boot:

1. Press Windows R to open the Run dialog box and type msconfig .

2. Go to the General tab. Then, click the Selective Startup option and make sure that the Load System Services and Load Startup items are selected.

3. Click the Services tab, and then select Hide all Microsoft services . Then, select Disable All .

4. Go to the Startup tab and click Open Task Manager . Disable all applications you do not use.

5. Click OK and Apply . Restart your computer.

Summarize

If you encounter the "This module prevents loading to local security agency (mdnsNSP.dll)" issue, you can try the above methods one by one to resolve this issue. I believe one of these methods can help you solve your problem.

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