How to Fix “Local Security Authority Protection Not Registering” Error on Windows 11 & 10

The Local Security Authority Protection (LSA) ensures that only authenticated users can log in to the local computer. It prevents the login from attackers and saves your computer from malicious login.

✓ It is mandatory to keep this setting enabled.

Due to some unknown reason, Local Security Authority Protection turns off and when you try to enable this setting, it asks for Restart. After the restart, when you check for this setting again, you see that this setting is still disabled.

No matter how hard you try, you will get the following condition each time.

Local Security Authority Protection Not Registering

How to Turn on Local Security Authority Protection on Windows 11 & Windows 10?

Here, in this article, I am going to discuss some useful ways to turn on Local Security Authority Protection on your Windows-based computer.

Method 1: Fix using the Outbyte PC Repair Tool

There might be some system misconfiguration issues like corrupted system files, bugs in registry files, outdated drivers, crashed software, etc; which are causing the problems and not allowing you to turn on Local Security Authority Protection.

Outbyte PC Repair Tool scans PC for troubles, repairs them, and gives you an error-free PC environment to work.

Windows is made with huge number of dll files, exe files, sys files, various types of services, databases, etc so, it is not possible to keep monitoring all the files always. A brilliant PC Optimizer tool repairs damages, fix errors, update windows and drivers, and eliminate various types of errors silently.

Outbyte PC Repair Tool does all the above task easily and provides you an errorfree and smooth Windows environment to work so that you can focus on your business only.

3 Steps to Fix this Error
Step 1. Download Outbyte PC Repair Tool [File Size: 16.4 MB]
Step 2. SCAN your Windows PC
Step 3. Click Fix button to Repair Error

Method 2: Fix using Windows Update

It is like a security bug in Windows computers. Wait for the hotfixes that may come with the next Windows update. Keep downloading and installing the latest Windows updates to fix this problem. Also, update outdated drivers and apps.

Method 3: Turn on Local Security Authority Protection in Core Isolation setting.

Let’s try to turn on this setting using the Core Isolation window.

Step 1: Open Windows Security. Go to Settings ➜ Privacy & security ➜ Windows security.
Step 2: Click on Device security and open it.

open device security

Step 3: Click on Core isolation details and open it.

open core isolation setting

Step 4: Turn on the Local Security Authority Protection.

Turn on Local Security Authority

Method 4: Fix using Registry File

If the Local Security Authority Protection is turned off, you can enable it via the Registry file. It is recommended to make a backup of the registry editor and keep it an the external device before editing.

Step 1: Open Registry editor. Press Windows key + R to open the Run command and type regedit and click Ok.

open registry editor in windows 10 & 11

Step 2: Navigate to the following location
Step 3: On the Right side, find the entry as RunAsPPL. If you don’t find it, create a DWORD(32-bit) entry with this name.

edit RunAsPPL registry key

Step 4: Double-click on RunAsPPL and set the value to 1.


Step 5: Exit the Registry editor and reboot your computer.

Method 5: Fix using the PowerShell

Run the following command in Windows PowerShell to turn on the Local Security Authority Protection on Windows 8/10/11.

Step 1: Open Windows PowerShell. Click on the Start menu and search for Powershell and open it as administrator.


Step 2: Execute the following command step by step.
reg add HKLM\SYSTEM\CurrentControlSet\Control\Lsa /v RunAsPPL /t REG_DWORD /d 2 /f
reg add HKLM\SYSTEM\CurrentControlSet\Control\Lsa /v RunAsPPLBoot /t REG_DWORD /d 2 /f
Step 3: After executing the command, exit the PowerShell and Restart your computer.

Method 6: Repair your computer using SFC.exe, DISM, and CHKDSK commands.

Step 1: Open Command Prompt as Administrator.

open command prompt as administrator in Windows 8, 10 & 11

Step 2: Now run the following commands one by one.
i. System File Checker tool

sfc /scannow

ii. Run Dism command

Dism /Online /Cleanup-Image /CheckHealth
Dism /Online /Cleanup-Image /ScanHealth
Dism /Online /Cleanup-Image /RestoreHealth

iii. Run Disk checking utility.

chkdsk /f c:

Method 7: Enable it via editing the Group Policy

You also need to enable the “Configures LSASS to run as a protected process” in the Group Policy editor.

Step 1: Click on the Start menu and search for “Group Policy” and open the Edit group policy.


Step 2: Navigate to the following location:
Local Computer Policy ➜ Computer Configuration ➜ Administrative Templates ➜ System ➜ Local Security Authority.
Step 3: Double-click on “Configures LSASS to run as a protected process”.


Step 4: Enable the setting and Enabled it with UEFI Lock in the Options box.


Step 5: Click Apply and Ok to save the settings.
Step 6: Restart your computer to apply changes.


You may find the Local Security Authority Protection setting turned off for no reason. There are some solutions written in this article that will help you in fixing of Local Security Authority Protection Not Registering error.