Thanks all.
I have found a way for this issue.
at first, I will creat a new account of windows with the Privilege under administrator. And then I log in with that new account.
From that new account, I go to service.msc so that I can disable "Lan settings" and after that restrarting computer.
last step still log in with new account and setup new account with user limiting.
so, new account can not use internet explore But still recieve email from outlook express.