Kbldfltr Service Defaults in Windows 8

Keyboard Lockdown Subsystem by Microsoft Corporation.

The Kbldfltr service exists only in:

Default Settings

Startup type: Manual
Display name:Kbldfltr
Service name:kbldfltr
Service type:kernel
Error control:normal
Group:Extended Base
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\kbldfltr

Default Behavior

The Kbldfltr service is a kernel device driver. In Windows 8 it will not be started until the user starts it. If Kbldfltr fails to start, the error details are added to Windows 8 error log. When the operating system startup is complete, the user is being notified that the kbldfltr service hasn't been started.

Restore Default Startup Configuration of Kbldfltr

1. Run the Command Prompt as an administrator.

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

sc config kbldfltr start= demand

3. Close the command window and restart the computer.

The kbldfltr service is using the kbldfltr.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 8 installation media.