are officially supported on Windows 11, you can often get R21 to work by following these steps: Dassault Systèmes 1. Essential Pre-Installation Steps Compatibility Mode: Right-click the file, select Properties Compatibility , and set it to run in compatibility mode for Admin Rights: Always right-click and select "Run as administrator"

CATIA V5 R21 remains a staple in industries like aerospace and automotive engineering due to its stability and specialized toolsets. However, Windows 11 introduces strict security and driver requirements that can interfere with legacy software. This guide provides the exact steps to bypass common installation errors and get your CAD environment running smoothly. Preparation and System Requirements