Thanks for your help but it still uneable to conect and I got the problem below after that

Could you please show me how to solve it and how do I chage to to the default setting
1 more thig is when I type 192.168.0.1 I always get a popup secure like this

and I can not go to Dlink router home page.I can not set up my home network without user name and password on D-link router