joyce wrote

If the webpage can be opened properly on other computers, that means the webpage is working fine.
Can the computer respond quickly when you try to open the websites and some file on the computer? Have you tried different web browser?

Lambo wrote

I have some TP-link routers, like TL-WR740N, TL-MR3020...
In my experience, I met such a problem before: some computer can access the configuration page quickly, and some computer cannot quickly or lost some menus.
I also tried different web-browsers: some can access the configuration page quickly and some slowly and lost some menus. This is technology ! Miracles happens like this !
This is my thought: On one hand, computers differs from each other in OS, or hardware, and web-browsers differs from each other in different layout engine or different web standards.
There maybe some compatible problem between them. On the other hand, this is fact that the manufacturer will need to change the configuration design to meet the requirement of different devices, of differentweb-browsers.
So I will try different computers or different web-browsers. If these methods can solve it, so I will let it be...

As to windows 8, I do not like it. A lot of compatibility problem like that. It is a little annoying. As I said, this is technology. Even the Great company Apple has its issue.