I have recently purchased two new notebooks both running windows 7 ultimate 64 bit and I have a 400 Billion Telkom Router with wireless internet capabilities. During the first few days the wireless connection between the router and the laptops worked perfectly and both had internet but then all of a sudden all internet access was lost. The network was still running and the laptops could connect without any problem but nothing I do will allow me internet access. The same thing happened with a wireless network adapter i purchased for my pc also running windows 7 ultimate 64 bit edition. I should note that the pc using the router is running windows xp and i wonder if it has something to do with a compatibility issue between the two operating systems. I have already tried changing the DNS server and ip adress but nothing seems to work. Any help will be appreciated!