System Event Notification Service - SENS.DLL
Sens.dll is a service provided by Microsoft. It tracks system events such as Windows logon, network connections, and power events. It notifies COM+ Event System subscribers of these events. By default, this service runs as 'automatic'. This serive has many dependencies so we'd recommend leaving it that way.

A description of services that run under svchost in Windows XP can be found at http://support.microsoft.com/default.aspx?scid=kb;en-us;314056.

A description of default services running under Winodws can be found at http://support.microsoft.com/default.aspx?scid=kb;en-us;Q250320.

Service

Microsoft