Which specific are you trying to program? Do you already have a hardware programming cable ready?
Proprietary synthesis engine optimized for Xilinx silicon structures. Operating System Compatibility & Virtualization Xilinx Ise 9.2 I Software Free Download
Installing 20-year-old software on modern OS requires finesse. Here is how to succeed. Which specific are you trying to program
However, the software was legally free (as in beer) back in its day. Here is where you can safely find the (the free, feature-limited version) and the Full Installer : Xilinx Ise 9.2 I Software Free Download
Even though the software is gone, the is still free.
If you are starting a new project, AMD recommends modern tools that support current hardware and Windows 10/11: