I have run into what I believe is the same problem with my daughter's Dimension 4600 PC. Everything works fine until she tries to connect to the internet. You can hear the modem get a dial tone when first connecting up, dial the number of the ISP, and then work to establish the connection. All this is audible from the modem's speaker. Then the words "Verifying Username and Password" appear in the dial-up login dialog box. and the modem noise and then white noise/pink noise stops. Then within about 3 - 5 seconds, a blue screen appears and the included error message shows up.