How to Fix Local Security Authority Protection is Off on Windows 

Are you getting a “Local Security Authority Protection is off. Your device may be vulnerable” error on Windows 11 or 10?

Local Security Authority Protection (LSA Protection) is a security feature on Windows that helps protect sensitive operating system data from unauthorized access or modification by malware.

LSA Protection isolates critical LSA processes in a secure, low-privilege container that prevents other processes, including malware, from accessing them.

It’s useful for preventing Pass-the-Hash attacks, where an attacker tries to steal user credentials from a compromised machine.

By isolating critical processes, LSA Protection can help prevent these attacks and provide an additional layer of security for Windows operating systems.

If you don’t have it turned on or if it’s having issues, your computer will be vulnerable to attacks.

In this guide, you’ll learn how to fix Local Security Authority Protection is off and how to turn it on in Windows 11 or 10.

How to fix Local Security Authority Protection is off on Windows 

To fix Local Security Authority Protection is off on Windows, try repairing and resetting Windows Security.

You can also try changing the RunAsPPL Values to “2” in “regedit”.

Method 1: Repair and reset Windows Security

1. Search for “Windows Security” using Windows Search.
2. Right-click “Windows Security” and click on “App Settings”.
3. Click on the “Repair” button.
4. Click on the “Reset” button.

Method 2: Change RunAsPPL Values

Please follow these step-by-step instructions:

1. Search for “regedit” using Windows Search and open it.
2. HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control > Lsa.
3. Double-click “RunAsPPL” and change the “Value data” to “2”.
4. Right-click an empty area > New > DWORD (32-bit value).
5. Rename the new file as “RunAsPPLBoot”.
6. Double-click “RunAsPPL” and change the “Value data” to “2”.
7. Restart your computer and the issue will be fixed!

If you still see the error message, you need to change the value data of “RunAsPPL” and “RunAsPPL” to 1.

Alternatively, you can uninstall the latest Windows update.

Further reading

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