COM+ Event System - Windows Vista Service
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.
This service also exists in Windows 10, 11, 7, 8 and XP.
Startup Type
| Windows Vista edition | without SP | SP1 | SP2 |
|---|---|---|---|
| Starter | Automatic | Automatic | Automatic |
| Home Basic | Automatic | Automatic | Automatic |
| Home Premium | Automatic | Automatic | Automatic |
| Business | Automatic | Automatic | Automatic |
| Ultimate | Automatic | Automatic | Automatic |
Default Properties
| Display name: | COM+ Event System |
| Service name: | EventSystem |
| Type: | share |
| Path: | %WinDir%\system32\svchost.exe -k LocalService |
| File: | %WinDir%\system32\es.dll |
| Error control: | normal |
| Object: | NT AUTHORITY\LocalService |
| Privileges: |
|
Default Behavior
The COM+ Event System service starts as NT AUTHORITY\LocalService and runs in a shared process of svchost.exe. If COM+ Event System fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the EventSystem service has failed to start. If you disable this service, then 5 other services will be unable to start (see the "Dependencies" section below).
Dependencies
COM+ Event System will not start, if the Remote Procedure Call (RPC) service is stopped or disabled.
If the COM+ Event System is stopped, the following services will not start and initialize:
- Background Intelligent Transfer Service
- COM+ System Application
- DFS Replication
- SL UI Notification Service
- System Event Notification Service
Restore Default Startup Type of COM+ Event System
Automated Restore
1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.
2. Save the RestoreCOMEventSystemWindowsVista.bat file to any folder on your hard drive.
3. Right-click the downloaded batch file and select Run as administrator.
4. Restart the computer to save changes.
Note. Make sure that the es.dll file exists in the %WinDir%\system32 folder. If this file is missing you can try to restore it from your Windows Vista installation media.