i have used both and have only ever had issues with PC's. and have you ever tried to get tech support on the phone? if i call toshiba they tell me to call the internet provider. the internet provider tells me to call the lap top manufacturer.
i am computer literate compared to many people i know. but i do not wish to go changing settings in my moms computer without getting some informal, yet more informed help first.
Are there any computers there that can currently connect to the internet via that wireless router? You need to determine what the settings are.
If no information is available, you can always factory reset the modem and start from there (an open connection).