Windows7 Internet lack of connectivity

:confused: I have just purchased a new pc loaded with windows7. I plugged the ADSL router in and without any setup, I was on the internet. 2 days later the connection has ceased (even though it works on my old pc with Windows ME on, so we know the router etc is fine) - I simply cannot get the win7 machine back onto the internet. under networking - it shows 2 networks connected, which is worrying. Please can someone help? :confused:

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