Kbldfltr Service Defaults in Windows 10

Keyboard Lockdown Subsystem by Microsoft Corporation.

Default Settings

Startup type:
Windows 10 Home 1507N/A
Windows 10 Pro 1507N/A
Windows 10 Education 1507N/A
Windows 10 Enterprise 1507N/A
Windows 10 Home 1511N/A
Windows 10 Pro 1511N/A
Windows 10 Education 1511N/A
Windows 10 Enterprise 1511N/A
Windows 10 Home 1607N/A
Windows 10 Pro 1607N/A
Windows 10 Education 1607N/A
Windows 10 Enterprise 1607N/A
Windows 10 Home 1703N/A
Windows 10 Pro 1703N/A
Windows 10 Education 1703N/A
Windows 10 Enterprise 1703N/A
Windows 10 Home 1709N/A
Windows 10 Pro 1709N/A
Windows 10 Education 1709N/A
Windows 10 Enterprise 1709N/A
Windows 10 Home 1803N/A
Windows 10 Pro 1803N/A
Windows 10 Education 1803N/A
Windows 10 Enterprise 1803N/A
Windows 10 Home 1809N/A
Windows 10 Pro 1809N/A
Windows 10 Education 1809N/A
Windows 10 Enterprise 1809N/A
Windows 10 Home 1903N/A
Windows 10 Pro 1903N/A
Windows 10 Education 1903N/A
Windows 10 Enterprise 1903N/A
Windows 10 Home 2004N/A
Windows 10 Pro 2004N/A
Windows 10 Education 2004N/A
Windows 10 Enterprise 2004N/A
Windows 10 Home 20H2N/A
Windows 10 Pro 20H2N/A
Windows 10 Education 20H2N/A
Windows 10 Enterprise 20H2N/A
Windows 10 Home 21H1N/A
Windows 10 Pro 21H1Manual
Windows 10 Education 21H1Manual
Windows 10 Enterprise 21H1Manual
Display name:Kbldfltr
Service name:kbldfltr
Service type:kernel
Error control:normal
Group:Extended Base
Path:%SystemRoot%\system32\drivers\kbldfltr.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\kbldfltr

Default Behavior

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

Restore Default Startup Configuration for 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 %WinDir%\system32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.