You do not have to install Service Pack 1 in order to install Service Pack 2.
Service Pack 2 includes the most recent fixes, as well as all fixes included in Service Pack 1.
Important: You cannot install this update on a computer that already has Autodesk Inventor 2012 software installed. A separate Service Pack 2 is available for the Autodesk Inventor 2012 line of products.
This Service Pack 2 updates the standalone version of Autodesk® Inventor® View 2012 for all operating systems and languages.
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