12, 15, 15 with Vista patch
Version 12 will install, but gives an OLE error (which can be ignored) every time it is run. Since the vendor no longer supports version 12 at all, this is not a viable option.According to the vendor, a patch for version 15 will be available "within the next month or so".
As of May 3, 2007, a "hotfix" patch became available. This patch is available from http://support.spss.com/Tech/Products/SPSS/Patches/SPSSforWindows/SPSS15VistaHotfix.exewith installation instructions at http://support.spss.com/Tech/Products/SPSS/Patches/SPSSforWindows/15VistaHotfixReadme.html