Thanks Rob, good advice as it so happened!
Got the new box (which came with an ethernet cable, whereas my old one was usb), plugged it in and zilch! Finally discovered that my via ethernet adapter was disabled, enabled it, and l am now on. Never set up a network device myself, so fingers crossed, getting there slowly.
Right, final problem. Somebody set up my old ISP system so that all l had on the desktop was the IE icon, renamed as Internet. Clicked on it and it took me straight in to that ISP.
If l click on it now, it still comes up with my old ISP address and obviously says cannot connect.
How can l click on this icon so that it takes me to my new ISP provider?