: New support for SQL Server 2008 features like filestream and sparse columns.
: Improved startup times for Windows Presentation Foundation (WPF) and better execution for managed code. net framework 3.5 sp1 offline installer
Windows 7 SP1 includes .NET 3.5 SP1 as part of the OS, but you may need to repair or reinstall it. : New support for SQL Server 2008 features