Many possible causes. I would check the NIC driver and router firmware first. Or this link may help,
Vista Wireless IssuesVista: Common Problems with 802.11 Wireless ... Inability to Connect and the wireless doesn’t receive the single. 1) It could be the Wireless adapter driver ...
http://www.wifimvp.com/vistawireless.htm
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
"Santiago Merino" <SantiagoMerino@discussions.microsoft.com> wrote in message news:A2DD2E00-1123-4BD9-BAF0-365DD70A98AE@microsoft.com...
I had normally my WLAN profile configured fine, but after a bad shutdown. My
computer, now never get a valid IP, only if I configure a valid IP the
connection works. I have been checking my router but it's ok.
Where is the problem?