Find the on your desktop or in the installation directory ( .../win_b64/code/bin/CNEXT.exe ). Right-click the shortcut → Properties → Compatibility .

When the installation finishes, the box that says "Start CATIA". It is crucial to configure the environment before the first launch. 4. Post-Installation Configuration

If you have a high-resolution monitor, click and check "Override high DPI scaling behavior" to ensure the interface looks correct. Common Troubleshooting for Windows 11

Avoid long folder paths or special characters in the folder name to prevent read errors during setup. 2. Run the Setup in Compatibility Mode

Installing on Windows 11 requires navigating some compatibility hurdles, as this version of CATIA was originally designed for older Windows environments. However, with the right configuration, you can successfully run this powerful CAD suite on modern hardware. Prerequisites and Compatibility

You must have Administrator rights to install and configure licenses. Step-by-Step Installation Guide 1. Prepare the Installation Media

Follow the on-screen prompts for the destination folder (default is usually C:\Program Files\Dassault Systemes\B21 ).

Again, set it to run in compatibility mode for and check Run as Administrator .

Extract your CATIA V5 R21 installation files into a folder on your local drive (e.g., C:\CATIA_Install ).