Windows 7 Service Pack 1 (SP1) is an important update that includes previously released security, performance, and stability updates for Windows 7. SP1 also includes new improvements to features and services in Windows 7, such as improved reliability when connecting to HDMI audio devices, printing using the XPS Viewer, and restoring previous folders in Windows Explorer after restarting.
Installing SP1 helps keep Windows 7 up to date. For information on how to get SP1, see Learn how to install Windows 7 Service Pack 1 (SP1).
For general information about service packs, go to the Service Pack Center webpage on the Windows website.
For technical information about SP1, such as release notes and the SP1 deployment guide, go to the Windows 7 Service Pack 1 resources webpage on the Microsoft TechNet website.