Il s'agit de vegas pro 19 .00648

Quelle est l'erreur exacte? Un imprime écran de cette derniere serait le bienvenu afin de mieux cerner le problème.

Ci-joint les messages d'erreur

Suite à l'envoi d'imprime écran, avez vous une solution à mon problème svp ?

You may want to try doing a manual clean uninstall of Vegas Pro 19 following the instructions and process outlined in the following forum FAQ - https://www.vegascreativesoftware.info/us/forum/faq-how-can-i-do-a-clean-uninstall-of-vegas-pro--111205/

Please be aware that this involves editing your computer's registry so be very careful – there is no undo/CTRL-Z when editing the registry. But you can save (export) any registry folder before editing that registry folder.

Hopefully, this will clear your computer of all Vegas Pro 19 program coding and should allow you to install it again.