Services are applications that run in the background. They can start up on boot or when required and can run independently of the logged on users. The main tools that you can use when managing services are the Services Console (Services.msc), the Task Manager, the Sc.exe command line utility, and Group Policies. To troubleshoot services during startup use the msconfig utility.
The services console lists all services and provides information about each service such as, logon details, state, etc. To start the Service consoles type services in the Start search text box and click the Services link under programs.