Things to Know About Windows Server 2008/Windows Vista Service Pack 2 (SP2)
If you have any beta versions of SP2 installed, they must be un-installed prior to installing.
You must have a genuine copy of Windows Server 2008 with Service Pack 1 (SP1) or Windows Vista with SP1 installed on the computer prior to installing SP2.
If “vLite” was used to customize your Windows Vista installation, you may have removed required system components which prevent Service Pack 2 from installing. See KB 968279 for additional details before installing Service Pack 2.
Beta versions of Windows Server 2008 SP2/Windows Vista SP2 are time-limited software that will operate until June 1, 2010. If you installed any beta versions of Windows Server 2008 SP2/Windows Vista SP2 it is highly recommended that you uninstall them before June 1, 2010.