I have alrealdy a Norton Family account. When I finish installing Norton Familly on my computer, a window appears. It requires me Sign in. But I can not Sign in with my account. I make sure that I typed correctly the account and password. I also tried to Sign up another account and done it again, but it still did not work. It annouced that: Authentication failed. Verify your email address, password and Internet connection and try again. I make sure that there is no problem with my typing and my Internet conection.
What's wrong with my Norton Family?