from here 1. Load up your ISO or DVD VS2010 Installer in an explorer window 2. Go to the WCU foldler 3. Go to the DAC folder 4. Install MSI's i. DACFramework_enu.msi ii. DACProjectSystemSetup_enu.msi iii. TSqlLanguageService_enu.msi In case not working at all check uninstall Visual Studio 2010
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