Vista wireless

Hi, right I had been asked by a mate up the road to help him out as he bought his daughter a laptop and wanted to set it up and connect to his wireless network.
Ok so I got the laptop set up but then tried to connect to the network. Now here I made a bit of a Noob error, I couldn't find any networks so tried connecting manually putting in the settings, but then after failing I noticed the wireless button on the laptop, yes go on totaly noob I should be shot blah blah. The problem now is it finds loads of networks and my mates is at the top but there is a big red cross saying the settings saved on that laptop arn't the same for that network. So how do I get rid of that profile? or change it so I can connect. If I use the remove button in manage networks will it still find it after reboot or not.