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.
You will receive, in the Event Log, an entry from "DCOM" complaining about not having this service running if disabled. If set to manual, many services report to it, so it will start anyway. This service is required for System Event Notification and BITS, which in turn, is required for Automatic Updates.
Take note: Manual updates via Windows Update Version 6 web site still requires Automatic Updates, Background Intelligent Transfer Service, COM+ Event System, Cryptographic Services, and Event Log to be running. Place all in automatic if you do not wish to update manually. In addition, I recommend that you change the default time of 3AM, for the automatic checking of updates, to a time when the system is "normally" on.
For the fun of it, check:
"C:\Program Files\ComPlus Applications\"
On your system, see if you have any installed "COM+" Applications.
Take note: BootVis requires Task Scheduler and COM+ Event System to be running if you wish to take advantage of the "optimize system" function. Why is it required? It is due to the pre-fetching function built into Windows XP. Another Note: Pre-fetching only occurs on boot up and application start, so if you do not care about a few extra seconds of boot time, you may decide to not even bother with it and disable Task Scheduler. However, depending on the system and what applications are being used, pre-fetching may increase performance. Windows Media Player may also require this service for some "features" to function. MS' .NET may require this service in the future.
None at this time.
Default XP Pro x64: Automatic
Safe Setting: Automatic
Service Name (registry): EventSystem
Display Name: COM+ Event System
C:\WINDOWS\system32\svchost.exe -k netsvcs
Account: Local System Account
What service COM+ Event System needs to function properly:
What other service require COM+ Event System to function properly:
Welcome Guest!
"Have you tweaked your OS lately?"
Choose the look:
Windows Service Configurations!
Includes explanations of each service and advice on which services you can safely disable.