For maximum stability on Windows 7, use the original AutoCAD 2012 Installer and apply all necessary Service Packs.
A "portable" version of AutoCAD 2012 is a modified build of the software that allows it to run without a traditional installation. Key characteristics include: autocad 2012 portable windows 7 64 bits
While the idea of a portable CAD program is appealing, users should be aware of several significant drawbacks associated with unofficial portable builds: For maximum stability on Windows 7, use the
128 MB or greater with Pixel Shader 3.0 and Direct3D capability Key Features of the 2012 Version For maximum stability on Windows 7