The Superfetch (Sysmain) service maintains and improves system performance. The Superfetch service is part of a collection of performance-enhancing features that address responsiveness issues related to demand paging. We do not recommend using the Superfetch service on servers unless the server is being used as a workstation.

This service is installed by default in Windows 7, and its startup type is Automatic. The service is installed by default in Windows Server 2008 R2, and its startup type is Disabled.

When the Superfetch service is started in its default configuration, it logs on by using the Local System account.

The Superfetch service is dependent on the following system components:

• File Information FS MiniFilter
• FltMgr
• Remote Procedure Call (RPC)
• DCOM Server Process Launcher
• RPC Endpoint Mapper