I assume you are just using your DS708 to register.
Well, as ede65 said, the web browser in DS708 is very slow, I strongly suggest you register your tool thru your computer and get the authorization. You only need to enter your Autel ID and password for the first time update. ..Later you don't need to input them again.
So I suggest you do the first update thru your computer, then later you can finish the update in your DS708.