Article ID: 938371 - View products that this article applies to.
Technical update, April 8, 2008This is a rerelease of this update. The rereleased version includes additional performance and reliability enhancements that apply to both Windows Vista-based and Windows Vista Service Pack 1-based systems. The original update was applicable only to Windows Vista-based systems. Users who have already installed Windows Vista Service Pack 1 will only install the new components in this rereleased update.
The rerelease of this update contains fixes for two issues:
This article describes the prerequisite software updates that apply to versions of Windows Vista that are mentioned in the "Applies to" section. These updates are a prerequisite for Windows Vista Service Pack 1 (SP1). Additionally, these updates help improve reliability when you install or remove Windows Vista SP1.
Two or three additional software updates are required before you install Windows Vista SP1. The software updates that are required depend on the version of Windows Vista that you want to upgrade. Prerequisite update 935509 that is listed in this article only applies to Windows Vista Enterprise and to Windows Vista Ultimate. The other prerequisite updates that are listed in this article apply to all versions of Windows Vista.
Before Windows Vista SP1 is released, these prerequisite updates will be delivered to most users through Windows Update as part of regularly scheduled monthly updates. These updates will be installed together with other updates that will require that you restart the computer. Therefore, an additional restart will not be required. This delivery method will help simplify installation of the required updates.
If you decide to install Windows Vista SP1 by using the stand-alone installer instead of by using Windows Update, you will not have to install the prerequisite updates separately. The prerequisite updates will be installed by the stand-alone installer if they are necessary. The following three updates are required before you install Windows Vista SP1. However, these updates are also recommended if you do not intend to install Windows Vista SP1. These updates help improve reliability and performance when you install future individual updates from Microsoft:
Update informationThe original release of Update 938371 updates several internal components that Windows Vista requires in order to install or to remove Windows Vista Service Pack 1 more reliably. This update must be applied separately before you install Windows Vista SP1 to make sure that Windows Vista SP1 can be installed or removed from the computer. Update 938371 is necessary to install and to remove Windows Vista SP1 on all versions of Windows Vista.
Update 938371 is available from the Windows Update Web site. To obtain this update, follow these steps:
PrerequisitesNo prerequisites are required.
Restart requirementYou must restart the computer after you apply this update.
Update replacement informationThis update does not replace a previously released update.
Update removal informationYou cannot remove this update.
Windows PE informationThis software update does not apply to Windows Preinstallation Environment (Windows PE) for the release version of Windows Vista. Therefore, you cannot install Windows Vista SP1 in Windows PE for the release version of Windows Vista. If you want to run Windows PE for Windows Vista SP1, you must perform a clean installation of Windows PE for Windows SP1.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates