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I had an old router at home Netgear and just replaced it with a new ASUS one, it does not pick up my Dell E521 all my other devices, laptops etc. can access the internet, but the with the NIC built (Broad-Com 440x 10/100 integrated controller NIC) in the E521 it wont let me roll/install to an updated driver,stays at the initial install one, my OS is Window XP as well. If I switch back using the old router my dell e521 works and can go online no problem....this is insane!!!