I am trying to get online and now the computer is not detecting the modem. I have a Dell Dimension DIM4300S, Pentium(R) 4 CPU. System is Microsoft Windows XP 2002. I have check the Device Manager and there is not a modem listed. I have checked the Phone and Modem options and in the Modems tab there is a modem listed, but reads not present. The computer has been on line before and I believe it has a virus. This is not my computer, but a co-worker so I'm not sure of too much history. Any information would be great. Thanks.