I'm pretty sure this has been discussed before, but I have tried the methods mentioned already and I still can't figure out why...
I'm just got a new toshiba laptop with windows vista and I want to connect to my home network - I have a D-Link router. I have no trouble at all connecting to my university network or to my neighbour's unsecured one, but my home one is secure and even though my laptop detects it, it won't let me connect!
I have an older laptop with windows XP and that one connected fine when I did the setup wireless thing a few years ago... I was expecting some sort of password box to pop up when I tried to connect to my secured home network on my vista laptop, but the only message that I receive is "windows cannot connect to this network" whereas for window XP I actually get this password box where I can type my password in.
Any ideas? Thanks. (I'll admit I'm rather computer-retarded, so I hope you'll forgive me if I don't quite get some stuff...)

I would check the firewall first. Or this troubleshooting may help,
Vista issuesTroubleshooting Vista Network Issues. Vista Troubleshooting Collections ... Step by step troubleshooting . ... Troubleshooting Vista Wireless Issues ... chicagotech.net/vista/vistanetissues.htm
Bob Lin, MS-MVP, MCSE & CNE Networking, Internet, Routing, VPN Troubleshooting on ChicagoTech.net How to Setup Windows, Network, VPN & Remote Access on HowToNetworking.com

Maybe you've got this figured out already, but I thought I'd offer my experience.
Generally, when I try to connect to a secure wireless network, I go ahead and manually create a connection (Network and Sharing Center > Set Up a Connection or Network > Manually Connect to a Wireless Network).
You have to have the SSID of your network (the network name) and the encryption key or creation phrase, which I assume you have.
I've done this for all of the secure networks I use, and it's worked.
Don't ask me why super-spiffy Vista isn't capable of user-friendly networking. I mean, if Mac can do it...
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