When you install SQL Server on server operating systems, SQL Server makes several modifications to the environment. These modifications include new system services, integrated authentication, new domain/workgroup accounts, and registry updates.
When you install SQL Server on Windows, several services are installed on the server. These services include:
Active Directory Helper. MSSQLServerADHelper adds and removes objects used to register SQL Server and Analysis Server instances. It also updates object permissions related to SQL Server service accounts.
Analysis Services. The Microsoft SQL Server Analysis Services are used for OLAP and data mining. For the default database instance, this service is named ...