AC17 - Support for Win XP and 32-bit Systems Discontinued

[Katalin Takacs]

ArchiCAD 16 is the last release of ArchiCAD to support Windows XP and any 32-bit operating system.
The next major release of ArchiCAD will be 64-bit only, and will support only 64-bit Operating Systems, including Windows 7 and Windows 8: http://www.archicadwiki.com/Discontinued32BitSupport