Cumulative updates to protect against vulnerabilities discovered after the initial 2009 launch.
Enables you to connect to the computer from another machine remotely. Sp1 Windows 7 Prof X64
Support for Hyper-V features, allowing for better memory management in virtual environments. Sp1 Windows 7 Prof X64
DirectX 9 graphics device with WDDM 1.0 or higher driver. Sp1 Windows 7 Prof X64
Includes the ability to back up your entire system to a network location. Contents of Service Pack 1 (SP1)
Windows 7 Professional with Service Pack 1 (SP1) 64-bit is a version of the Windows operating system that includes the original OS features along with a significant collection of updates, security patches, and performance improvements released through February 2011. Core Features of Windows 7 Professional