internet connection problem

[kurosagi01]

So yeah..this is for a friend,she has 3 computers connected to the router right.
Her computer,her dads and her brothers.
The problem is..there all connected and they can access internet fine but her brothers computer can't access internet explorer or mozilla firefox,it shows blank page.
Any sugguestion on fixing this? he is connected by wireless like his sister but his sister can go on mozilla firefox no problem but he can't.

 

[erocker]

Probablly needs to set Access Restrictions to allow for more than two users. Do they know how to setup the router via IP?

 

[kurosagi01]

don't think its to do with restrictions,she said it work before but now its not,could be internet explorer fault? and firefox appears blank page?
Edit:
using usb wireless adaptor

 

[a_ump]

do any other internet using apps work? like instant messenging of some sort? you may not be connected. And no i wouldn't think mozilla firefox would fault like that, as it recieves updates and auto installs them, unless you specify otherwise.