Service Pack Center
Get the latest service pack for your version of Windows
A service pack (SP) is a Windows update, often combining previously released updates, that helps make Windows more reliable. Service packs, which are provided free of charge on this page, can include security and performance improvements and support for new types of hardware. Make sure you install the latest service pack to help keep Windows up to date. Service packs take about 30 minutes to install, and you'll need to restart your computer about halfway through the installation.
The recommended (and easiest) way to get service packs is to turn on Windows Update for Windows 8, Windows 7, and Windows Vista, or Automatic Updates for Windows XP, and let Windows notify you when the service packs you need are ready to install. Turning on Automatic Updating is quick and easy, and it saves you time and disk space.
Learn how to identify what version of Windows and service pack you are running