In order to prevent any possible issues as a result of automatic service pack installation, Microsoft has created a tool for blocking automatic service pack update of Windows Vista, Windows XP (SP3) and Windows Server 2008 via its automatic update service. The Windows Service Pack Blocker Tool Kit is especially useful for organizations and corporate, because any problems associated with the OS update could not be tolerated.

This tiny (95Kb) toolkit contains three components. All of them function primarily to set or clear a specific registry key that is used to detect and block download of Service Packs from Windows Update. You only need to use the component which best serves your organization’s computer management infrastructure.

This toolkit will not prevent the installation of the service pack from CD/DVD, or from the stand-alone download package. It simply prevents the service pack from being delivered over Windows Update. More information and download. [via ]

Meanwhile Windows Vista SP2 and Server 2008 are available for public download. the latest service pack supports new types of hardware and emerging hardware standards, includes all of the updates that have been delivered since SP1.
Download Window Vista /Server 2008 SP2 (32bit), SP2 (64bit)