Do you have a phone socket ( professionally installed ) downstairs at all ? You could still connect to it with a router if the installation is Ok , although the main socket is preferable , then you can have an ethernet modem/router downstairs which would be considerably easier . The external modem for dial up would not be needed and could be uninstalled , although you could keep it somewhere handy just in case . As with all broadband , ADSL splitters would need to be fitted on all phone sockets that have phones or sky boxes attached to them . The only problem Tiscali had with Vista was with the drivers for the USB broadband modems they had used , a modem/router wouldn't have such problems .