SPSS 17 does not support Windows 7 or Snow Leopard (http://support.spss.com/ProductsExt/Statistics/Compatibility.html), Version 18 does support these operating systems. SPSS, Inc. estimates it will ship version 18 to Vanderbilt sometime during the second half of October. Version 18 will be a free upgrade to current subscribers.
Please contact software.store@vanderbilt.edu if you need additional information.