Hi, We have a site license of CADian 2008 under the name of "Aswathanarayana & Eswara". We have some systems with Windows 7. Sometimes we are having problems using CADian 2008 with WINDOWS 7. Please let us know if you have a separate version for this. Also please give us the link where we can download the latest version of CADian. Regards, Sriprakash