What's the requirement of the software installation?
The application has only one requirement. According to the official website, you will need Windows 98 and above to install the application. I have downloaded and installed it in Windows 8 x64 and it works flawlessly without any errors.
Official website: http://www.indianastrologysoftware.com/free-download-kundli-software.php#download21-tab
Make sure you use Run as Administrator if you use a version higher than Windows XP.