[Osiris]

Two or three updates are required before you install Windows Vista Service Pack 1. The updates that are required depend on the edition of Windows Vista that you are upgrading. Prerequisite update 935509 is only applicable to Windows Vista Enterprise and to Windows Vista Ultimate. The other prerequisite updates that are discussed in this article apply to all editions 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. An additional restart will not be required. Therefore, this delivery method will simplify installation of these prerequisite updates.
Customers who decide to install Windows Vista SP1 by using the stand-alone installer, instead of by using Windows Update, will not have to install the prerequisite packages separately. The prerequisite packages will be installed by the stand-alone installer if they are necessary.

Download: Update for Windows Vista | x86 | x64

First Windows Vista SP1 Prerequisite Update - www.Tech-Dump.com

[servo.tsc]

Nice to know. Have you tried the official vista service pack 1?

[Mak213]

It is still in Beta. It is not released yet. I have RC1 installed right now.

[Black Falcon 921]

Does anyone have a more firm date of when this might be out? I know sometime soon but how soon are we really talking?

[Mak213]

They have only said 1st Quater of this year. So from Jan to March is the bet we can do.