Windows XP, Vista, 7, 8, or 10 (32-bit or 64-bit compatibility varies by build). RAM: Minimum 512MB (2GB recommended for complex 3D work).
While Autodesk has officially retired this version, it remains a topic of interest for users with older hardware or those who prefer its classic perpetual-license feel over modern subscription models. Key Features of AutoCAD 2009 Portable Autodesk AutoCAD 2009
Autodesk does not authorize or support "portable" versions of its software (versions that run from a USB drive without installation). Any "Portable AutoCAD 2009" available on third-party websites is: Windows XP, Vista, 7, 8, or 10 (32-bit
Autocad 2009 lt portable license utility unknown - Forums, Autodesk Portable Autodesk AutoCAD 2009