If you try to install The Panorama Factory x64 Edition on Vista x64,
the installer displays this message:
The Panorama Factory V4 x64 Edition
requires Windows XP (or newer) x64 Edition. You are not running this
version of Windows.
The m32 Edition is the correct version to
install on your computer.
The message is, of course, incorrect. The Panorama Factory x64
Edition is the correct version to install on Windows Vista x64.
Unfortunately, the installer incorrectly believes that you are running
Windows Vista x86 (the 32-bit version).