Pleaz help unlocking my broadband router MODEL: D-link DSL-2640R

SOURCE: DSL 2640R D-LINK ROUTER

Perhaps you're misreading the model number? There is a DSL-2640B on their site. Here's a link to the information:

http://www.dlink.com/products/?pid=567

If it really is an "R" at the end, it might be a specialized version for a particular service provider. But the basic information should be the same.

SOURCE: model dsl 2640r

You can put on a password for internet access for all wireless networks to prevent these strangers logging on.

SOURCE: Windows 7 and D-Link DSL-2640R router.

Hi
I presume that your internet was working fine before you bought your new laptop. Unless you've done something to change it it should still be working as before.
You shouldn't need a CD - if you think about it you don't need a CD when you log in in Starbucks so why should you need one at home?
The only thing you need to know is the router's wireless name; Talktalk 12345etc, and its password - which is the password your son is using.
I can't explain why you can't connect when your son is connected - as the router should be able to host 253 laptops (very very slowly mind) - unless the router has been set with an access list that only allows his laptop to connect.

SOURCE: DSL 2640R D-LINK ROUTER

Here's the website: http://www.dlink.co.uk/cs/Satellite?c=Product_C&childpagename=DLinkEurope-GB%2FDLProductCarousel&cid=1197375464607&p=1197318962342&packedargs=ParentPageID%3D1197318962321%26TopLevelPageProduct%3DConsumer%26packedargs%3DProductParentID%253D1195808621247&pagename=DLinkEurope-GB%2FDLWrapper

SOURCE: cannot find my router name and password

reset the router and reconfigure it ,,,, reset button located at the back of the router