It sounds as though friend has been using a USB ADSL Modem, which would in effect behave like a "dialup" connection in the PC.
When you use a combined "ADSL Modem/Router", it is the *ROUTER* which has to be configured to establish the connection to the ISP (Orange). Computers then connect to the router, either by ethernet cable or "wirelessly" and get their internet access over the LAN (Local Area Network). It may be necessary to uninstall the existing software to avoid a conflict with getting internet access over the LAN. Note that the PC DOES NOT connect to the internet, that is now the Router's function.