Network Bridge

[Damixnarai]

So I go to my brother in law's house and he gives me this one thing to create a wi-fi hotspot near my computer for my ds. Then when I get home I put the disk in, and it says that

"A network bridge is enabled. Please deleate the network bridge under network connections."

And I'm having some trouble because I really don't know what it is and if I should deleate it or not.

BTW: I'm using dial-up.