CoreMessaging (CoreMessagingRegistrar) Service Defaults in Windows 11
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 -p |
| File: | %SystemRoot%\system32\coremessaging.dll |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CoreMessagingRegistrar |
Default Behavior
CoreMessaging is a Win32 service. In Windows 11 it starts automatically during the operating system startup. Then the CoreMessaging service logs on as NT AUTHORITY\LocalService and running in a shared process of svchost.exe. If CoreMessaging fails to start, the failure details will be recorded into Event Log. Then Windows 11 should boot up and notify the user about the CoreMessagingRegistrar service startup failure.
Dependencies
CoreMessaging cannot be started, if the Remote Procedure Call (RPC) service won't start.
Restore Default Startup Configuration of CoreMessaging
Before you begin doing this, make sure that all the services on which CoreMessaging 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 commands below, paste them into the command window and press ENTER:
sc config CoreMessagingRegistrar start= auto
sc start CoreMessagingRegistrar
3. Close the command window and restart the computer.
The CoreMessagingRegistrar service is using the coremessaging.dll file that is located in the C:\Windows\system32 directory. If the file is removed or corrupted, read this article to restore its original version from Windows 11 installation media.