Autodesk ended Vista support in 2012 and the versions 2013 and up are not compatible with Vista. AutoCADu 2008 (and 2009-2012) compatibility applies for both 32-bit and 64-bit versions of Windows Vista Home Basic, Home Premium, Ultimate, Business and Enterprise. For AutoCAD 2007 and AutoCAD LT 2007 Autodesk has released Service Pack 2 which makes them compatible with the 32-bit version of Windows Vista.