System Event Notification (SENS) Service Defaults in Windows XP

Tracks system events such as Windows logon, network, and power events. Notifies COM+ Event System subscribers of these events.

Default Settings

Startup type: Automatic
Display name:System Event Notification
Service name:SENS
Service type:share
Error control:normal
Path:%SystemRoot%\system32\svchost.exe -k netsvcs
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SENS

Default Behavior

System Event Notification is a Win32 service. In Windows XP it is starting automatically along with the operating system. Then the System Event Notification service is running as LocalSystem in a shared process of svchost.exe. Other services and drivers are allowed to run in the same process. If the System Event Notification fails to start, the technical information about the error is added to the Event Log. Windows XP startup should proceed, but a message box should be displayed informing the user that the SENS service has failed to start.


System Event Notification depends on the COM+ Event System service.

Restore Default Startup Configuration of System Event Notification

Before you begin doing this, make sure that all the services on which System Event Notification depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt.

2. Copy the commands below, paste them into the command window and press ENTER:

sc config SENS start= auto
sc start SENS

3. Close the command window and restart the computer.

The SENS service is using the sens.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 XP installation media.