Microsoft released the Service Pack 2 for Windows Vista and Windows Server 2008. Service Pack 2 (SP2) represents the latest step in Microsoft’s commitment to continuous improvement. It includes all of the updates that have been delivered since SP1, as well as support for new types of hardware and emerging hardware standards. And since it comes with a single installer for both Windows Vista and Windows Server 2008, SP2 will be easy for IT Pros to manage, deploy, and support.
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I think MS needs to stop rushing on putting out OS's and take some time to design ones a little more stable.