Norton coming up blank

Norton Internet security activation menu will not come up. When I was dealing with the Norton tech guy he got the activation menu to start but the window would not come up but instead a blank black box that if you clicked around on it the buttons were there but you could not see anything but a blank box. The guy finally gave up and just told me to wait and see if it works eventually and gave me the license key and a support case number... but ofcourse its not going to. Im on windows 7 I have a really nice fast new computer. All the drivers are up to date. I already unistalled Norton completely and am now trying to reinstall it. Thank you.