Okay so we've got a functioning wireless network and one laptop is
using it right now, but a friend just moved in and her laptop is not
connecting properly.

She uses Windows Vista and it has a built-in wireless card. I'm not
computer-stupid, but I have no experience with Vista prior to this,
and I'm finding it to be incredibly frustrating.

We scan for the network, find it, connect to it and enter in the
security code. We get connected with 56Mpb/s but for some reason it
says "Limited Connectivity." How would one go about adding permissions
for this laptop? I try scanning for Wireless Devices and for some
reason it's not detected or listed. It's like they're both connected
to the same network, but can't see each other.. Very weird.

Help plz?