Update 935509 lets you correctly service Windows BitLocker Drive Encryption-capable computers. These updates help improve reliability and performance when you install future individual updates from Microsoft:ĩ35509 A software update is available for versions of Windows Vista that include the Windows BitLocker Drive Encryption feature However, these updates are also recommended if you do not intend to install Windows Vista SP1. The following three updates are required before you install Windows Vista SP1. The prerequisite updates will be installed by the stand-alone installer if they are necessary. 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. This delivery method will help simplify installation of the required updates. Therefore, an additional restart will not be required. These updates will be installed together with other updates that will require that you restart the computer.

The other prerequisite updates that are listed in this article apply to all versions of Windows Vista.īefore Windows Vista SP1 is released, these prerequisite updates will be delivered to most users through Windows Update as part of regularly scheduled monthly updates. Prerequisite update 935509 that is listed in this article only applies to Windows Vista Enterprise and to Windows Vista Ultimate. The software updates that are required depend on the version of Windows Vista that you want to upgrade. Two or three additional software updates are required before you install Windows Vista SP1.

Additionally, these updates help improve reliability when you install or remove Windows Vista SP1. These software updates are a prerequisite for Windows Vista Service Pack 1 (SP1). This article describes the prerequisite software updates that apply to versions of Windows Vista that are mentioned in the 'Applies to' section. Windows Vista Windows Vista Enterprise Windows Vista Ultimate Windows Vista Business Windows Vista Home Basic More.

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