I think that's just your email provider because when I get a profile activation email, I just have to click it. There's nothing to copy.
When a customer registers his profile, an Email is sent on his Email Box so that he confirms and finish hist registration.
On the sent Email, he must copy the link in his navigator.
What must be modified so that he just clicks on the link intead ?
(many "old" people don't know to do this).