CoreMessaging (CoreMessagingRegistrar) Service Defaults in Windows 10

Manages communication between system components.

Default Settings

Startup type:Automatic
Display name:CoreMessaging
Service name:CoreMessagingRegistrar
Service type:share
Error control:normal
Object:NT AUTHORITY\LocalService
Path:%SystemRoot%\system32\svchost.exe -k LocalServiceNoNetwork
File:%SystemRoot%\system32\coremessaging.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CoreMessagingRegistrar

Default Behavior

CoreMessaging is a Win32 service. In Windows 10 it is starting automatically when the operating system starts. Then the CoreMessaging service is running as NT AUTHORITY\LocalService in a shared process of svchost.exe along with other services. If CoreMessaging fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the CoreMessagingRegistrar service has failed to start due to the error.

Dependencies

CoreMessaging cannot be started under any conditions, if the Remote Procedure Call (RPC) service is disabled.

Restore Default Startup Configuration for CoreMessaging

1. Select your Windows 10 edition and release, and then click Download.

2. Save the Win10_CoreMessagingRegistrar_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The CoreMessagingRegistrar service is using the coremessaging.dll file that is located in the %WinDir%\system32 folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.