From KB 955392 there’s lot of info there, but the quickest “one time” install method is to follow “Procedure 1: Basic slipstream steps” 1. Install the .NET Framework 3.5.1 feature 2. Download the SQL SP1 service pack [http://www.microsoft.com/downloads/details.aspx?FamilyID=66ab3dbb-bf3e-4f46-9559-ccc6a4f9dc19&displaylang=