Can't install Catia V5

Hello,

Whenever I am trying to install Catia V5 through 3Dexperience on my Windows 8.1 laptop, I get the message "Starting installation" (in French "Lancement de l'installation") followed by the error message "Installation error" ("Erreur d'installation").

I previously successfully installed the 3Dexperience launcher.

What should I do ?

Thanks

Edu ​​​​​​​CATIA V5 ​​​​​​​