Smartlocker Filter Driver (applockerfltr) Service Defaults in Windows 10

Identifies files created by authorized installers.

The Smartlocker Filter Driver service does not exist in:

Default Settings

Startup type: Manual
Display name:Smartlocker Filter Driver
Service name:applockerfltr
Service type:kernel
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\applockerfltr

Default Behavior

Smartlocker Filter Driver is a kernel device driver. In Windows 10 it is starting only if the user, an application or another service starts it. If Smartlocker Filter Driver fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the applockerfltr service has failed to start due to the error.


Smartlocker Filter Driver cannot be started under any conditions, if the following services are disabled, deleted or working improperly:

Restore Default Startup Configuration of Smartlocker Filter Driver

Before you begin doing this, make sure that all the services on which Smartlocker Filter Driver depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config applockerfltr start= demand

3. Close the command window and restart the computer.

The applockerfltr service is using the applockerfltr.sys file that is located in the C:\Windows\system32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.