You wanted a Sony so you bought a Sony. Fair enough and PC World the shop where the shop assistant told me that some computer programs will only work with Intel processors, presumably to get a sale rather than him not having a clue. Naturally he lost the sale. Went somewhere that didn't talk waffle. That aside I'm afraid I have no idea as to what frequency the Wireless LAN uses in the US but you have three choices assuming it won't work over there (the others I'm sure will know whether this bit will work or not). Get a LAN card for your new PC on the correct frequency ( I presume you can do this) and if you have to do this I'd see the guy that sold you it or connect via a standard modem presuming theres one fitted or take it back again see the guy that sold you it and tell him you bought it for the US he told you it would work and it won't so you want a refund. Not much help I know. Sorry. I'm sure the others will know the answer.