I still dont understand how to setup my network. I tried the Sharing and security but i still cant find the folders on my brothers laptop.
Is the router configured for wireless sharing?
I know mine has an option for "Wireless Isolation".
Also, have a look at your router configuration (put the Default Gateway address (looks like 198.168.2.2) in your web browser.)
You can find out your default gateway by:
Run (or windows key + r) -> (Type) cmd (Hit enter) -> (Type) ipconfig /all (hit enter)
Have you run the network wizard?