Learn about Windows service packs and download the latest updates for Windows 10, Windows 8.1, Windows 7, Windows Vista or Windows XP.

Get the latest service pack or update 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.