Without having made any changes to the settings on my Windows 98 PC, I have suddenly become unable to connect to the Internet. When I try to, the modem goes through the usual sequence, I get the ‘connected to remote computer message’ on screen, then, after a pause ‘cannot find server’ – this happens with whichever ISP I use. The phone connection is fine, the send/receive leds flash on my (external) modem, which implies that it is working properly too. In desperation, I tried reformatting the computer but this has not helped either. Any ideas?