Can't say I'm much of a Windows expert, but this is somewhat of a weird occurence. I'm in front of a HP G61 Notebook laptop with Win7 that has connectivity problems. I mean that it's connected to the local network, Windows is absolutely convinced it can access the Internet, pinging arbitrary domains and IP addresses works, name resolution works too (and therefore must work UDP), but I can't connect to any website, or open MSN, or stuff like that. Even the Java Updater can't connect.
This is not a router issue, as other computers on the network can access the Internet. We also tried to join another wireless network, and found the same problems. Even with a wired connection, the same things happen.
My guess is that somehow, TCP is dead.
I've tried a bunch of things: restart the network adapter, reset the TCP/IP stack, reset WinSock too, but nothing works.
Any idea?
netsh int ip reset
andnetsh winsock reset
. This is not a computer I own, so I can't just test whatever gets suggested as I need a bit of traveling. :/telnet www.google.com 80
<Enter>GET / HTTP/1.0
<Enter> <Enter>. If you get some HTTP+HTML spew, then I would suspect your system's proxy configuration. If you don't, then I would suspect a firewall somewhere.