Windows Vista Service Pack 1 (SP1) is an update to Windows Vista that addresses feedback from our customers. In addition to previously released updates, SP1 will contain changes focused on addressing specific reliability, performance, and compatibility issues; supporting new types of hardware; and adding support for several emerging standards. SP1 also will continue to make it easier for IT administrators to deploy and manage Windows Vista.

Download: Service Pack 1 for Windows Vista
Download: Service Pack 1 for Windows Vista 64bit