A. If you use Windows Update to deploy updates to your organization, it's possible to block the automatic deployment of SP1 through Windows Update using the Microsoft-provided Service Pack blocker tool. Microsoft usually provides such a tool for each Windows service pack.

The blocker can be downloaded from Microsoft and consists of a group policy template, an executable and a script.

As usual with the blocker tools, it sets the registry value

HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate\DoNotAllowSP

to 1. You could also set this value with your own method. The blocker will stop the installation for 12 months once the Service Pack is released.