100% CRC Errors

Hi everyone,

I hope you can help me. I have been working on a friends wireless network today. He can,t get connected to the internet, although he can (now) get a connection to his router. At first I thought it may be his Conceptronic wireless network card so I replaced this with an Edimax USB one, but still had the same problem. Looking through the info given by the Edimax configuration utility, it shows that packets are being transmitted fine, but 100% of the received packets have CRC errors.

I´m stumped, as I´ve never seen this before. The computer is running XP Home, and connecting to a router supplied and branded by Telefonica (the phone provider here in Spain). What´s even more confusing is that his daughter has just bought a laptop with Vista on it, and it connects to the internet via wireless and the same router without any problem.

Hope you can shed some light on this as I don´t now know where to look!