suecfc

hi im with ntl and in the past week my broadband wouldnt connect , the isp address had disappeared and had to be reset this has happened twice then yesterday in the control panel there was no ntl connection so i had to uninstall the usb cable and reinstall (there was a yellow exclamation mark in device manager) ntl says there must be some conflict with ur pc, this is the first time this has ever happened and now they say to use a enet cable? does anyone have any ideas how i can find out whats causing this,ive been with ntl for a few years and never happened b4 nothing new has been installed i use windows xp thanks in advance