Windows 7, Windows Vista (SP2+), or Windows XP Professional x64
: Keep in mind that AutoCAD Mechanical 2012 is an older version of the software. Autodesk provides support based on the version of the software and its support lifecycle. This version may not be compatible with newer operating systems or hardware configurations. Windows 7, Windows Vista (SP2+), or Windows XP
Related topics you might find helpful: product activation for legacy Autodesk software, migrating DWG files between versions, and choosing a modern CAD subscription plan. Windows Vista (SP2+)