Install Catia V5 R21 On Windows 11 Fixed -

Temporarily disable real-time protection, as it often flags the DSLS installer or activator files as false positives. Enable .NET Framework 3.5:

Broken installation extraction or corrupted system paths.

Temporarily disable real-time protection, as it often flags the DSLS installer or activator files as false positives. Enable .NET Framework 3.5:

Broken installation extraction or corrupted system paths.