Can't access certain pages wirelessly...?

[HarriJ]

Hiya

The internet provided to our home comp is cable modem and the home comp can access all internet pages w/out problems, however any laptop that connects wirelessly to the same internet can't access some pages such as 'facebook, tesco, dell, ocr' just to name a few. Its a real pain and i have no idea how to fix it. If i connect to another network wirelessly from my laptop i can get on these pages :S i am seriously confused, any help appreciated, if you need any more info just say

cheers

 

[dberg35]

What router are you using? Has any changes been made to this router and if so reset back to factory specs and see if this works.