Uff The script is not valid, i need to do these command but i need that the user don't see the process of regsrv32. I need silent mode or similar. Do you know thati it's possible? The cuestion is that i need regiter a dll from cd autorunning, it's necessary for run the application (demo cd), and in windowsXP works perfectly but in vista my problem is the UAC (user control acces) if yo know another form of disable the UAC I would be happy. Thanks in advance.