: Autodesk generally only provides downloads for the current version and the three prior versions. AutoCAD 2009 is no longer available for official download.
Carry your entire design environment—complete with your custom toolbars and settings—in your pocket. Key Features of the 2009 Edition Portable Autodesk AutoCAD 2009
To clarify, Autodesk does not officially offer or support a "Portable" version of AutoCAD 2009. Versions marketed as "Portable" on third-party sites are often unofficial, modified versions that can pose security risks or legal issues. : Autodesk generally only provides downloads for the
Before seeking a portable version, it is important to understand the current landscape of older Autodesk software: System requirements for AutoCAD 2009 - Autodesk Portable Autodesk AutoCAD 2009