COM+ Event System (EventSystem) Service Defaults in Windows 8

Supports System Event Notification Service (SENS), which provides automatic distribution of events to subscribing Component Object Model (COM) components. If the service is stopped, SENS will close and will not be able to provide logon and logoff notifications. If this service is disabled, any services that explicitly depend on it will fail to start.

Default Settings

Startup type:Automatic
Display name:COM+ Event System
Service name:EventSystem
Service type:share
Error control:normal
Object:NT AUTHORITY\LocalService
Path:%SystemRoot%\system32\svchost.exe -k LocalService
File:%SystemRoot%\system32\es.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventSystem
Privileges:
  • SeChangeNotifyPrivilege
  • SeImpersonatePrivilege

Default Behavior

COM+ Event System is a Win32 service. In Windows 8 it is starting automatically during the operating system startup. Then the COM+ Event System service runs as NT AUTHORITY\LocalService in a process of svchost.exe, sharing it with other services. If COM+ Event System 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 EventSystem service hasn't been started.

Dependencies

COM+ Event System can't start, if the Remote Procedure Call (RPC) service is disabled or not available.

All the services listed below will not start if COM+ Event System is disabled:

Restore Default Startup Configuration for COM+ Event System

Before you begin doing this, make sure that all the services on which COM+ Event System 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 EventSystem start= auto
sc start EventSystem

3. Close the command window and restart the computer.

The EventSystem service is using the es.dll file that is located in the %WinDir%\system32 folder. If the file is corrupted or deleted, you can put it back in there.