Windows Vista Service Pack 1 (SP1) RC should be used to update a PC running Windows Vista RTM to Windows Vista SP1. This standalone package will install SP1 as well as any applicable pre-requisite packages. The 5-Language standalone package supports installations on all versions of Windows Vista with one or a combination of the following languages installed: English, German, Japanese,

The Windows Vista Service Pack 1 (SP1) Release Candidate (RC) is now available to the public. In addition to previously released updates, SP1 contains changes focused on addressing specific reliability and performance issues, supporting new types of hardware, and adding support for several new technologies. SP1 also addresses some management, deployment, and support challenges. Things to know before you download