Windows Vista Service Pack 1 RC Refresh is available for download. This is pre-release software for individuals, organizations, and technical enthusiasts who are comfortable evaluating pre-release software and is provided for testing purposes only. You must have a genuine copy of Windows Vista installed prior to installing Windows Vista SP1 RC Refresh.
The prerequisite updates consist of two updates which service specific Windows components prior to the installation of the service pack and a third update which services the installation software built into Windows Vista. The following are the prerequisite updates:
- KB935509 – This updates is only required on Windows Vista Enterprise and Windows Vista Ultimate editions (which have Bitlocker capabilities). This update is required prior to installing KB938371, the second prerequisite update and is required to prevent potential loss of data on Bitlocker encrypted systems during updating.
- KB938371 – This update consists of fixes for several components (including the TrustedInstaller), increases the success rate for installing the service pack and enables the service pack to be uninstalled successfully.
- KB937287 – This is an update to the “Servicing Stack” or the Windows Vista component installer technologies built into Windows Vista. This update enables the built-in installer to properly and successfully install the service pack.
There are two ways to install the service pack, first, as a pop-up notification that the service pack is ready to be installed (this is the method in which most users will install the service pack) and using multiple manual installations from Windows Update. The first method is the simplest, but may take up to four days for the Windows Update Automatic Update feature to deliver each of the 3 prerequisites and the service pack. Windows Vista SP1 distributed through Windows Update will be applicable to Windows Vista machines that are running on any of the 36 languages supported by Windows Vista RTM.