Your .lic file or DSLS license server details.

If you are encountering a specific error message, could you tell me: Is it during installation or when opening the software? Are you using a license server or a local file? I can then help you with a more specific solution. Share public link

(or Custom if you only need specific modules like Mechanical Design).

The installer launched. A wave of nostalgia hit him—the classic gray interface, the Dassault Systèmes logo. He clicked through the prompts, selecting the default installation path ( C:\Program Files\Dassault Systemes\B21 ).

When prompted to create new directories for the environment, click . Complete the Wizard:

: Windows 11 24H2 and above have Smart App Control enabled by default, which blocks cracked software like CATIA from running.

Have your CATIA V5 R21 installation files (ISO or extracted folder) ready.

Create a new folder directly on your main drive, named C:\CATIA_Setup .

If you are using a student or official license, ensure you have the DSLicTarget.exe tool to generate your unique Target ID for licensing. Step-by-Step Installation Guide Extract Installation Files: Place all downloaded ZIP parts into one folder.

Although CATIA V5 R21 officially requires Windows 7 or 8, a Windows 11 installation demands:

Check the box for and select Windows 7 from the drop-down menu.

This tutorial is for educational purposes only. Ensure that you have the necessary licenses and permissions to use CATIA V5 R21 for commercial or industrial purposes. Additionally, be aware of the potential risks associated with cracking software and use caution when doing so.