there is a whole range of possibilities. #1, depending on someone elses wireless connection is not the best idea. #2, he could have enabled WEP, (could have noticed that an additional user was logging through his router and turned it off). #3, his internet could be down, the router will broadcast regardless, still giving you and IP address. Is this someone you know that allowed you to connect? #4, weak signal, do an ipconfig and ping the default gateway, example- Start - Run - cmd then press enter -type: ipconfig - look for the default gateway such as 192.168.1.1, type: ping -t 192.168.1.1 allow this to ping for about a minute, then hit control C, statistics of the ping test will show up on the bottom such as packets sent and packets recv'd and total packet loss %. you also want to look at how many milliseconds/ms it took. if it is super high in the hundreds and there is larger numbers between them or dropped packets (request timed out) you may have high latency and it is not allowing you to establish a DNS. if everything appears well here then you should talk to the person who owns the wireless router/access point. Hope this helps
