Follow the on-screen instructions to install CATIA V5 R21. If you encounter any issues during installation, ensure that you have properly extracted the installation files and that your compatibility settings are correct.
at the end of the path if you encounter high DPI or scaling issues. File Extraction Strategy install catia v5 r21 on windows 11 fixed
If you encounter issues during or after installation, try: Follow the on-screen instructions to install CATIA V5 R21