Advertisements I just got a new laptop with XP, service pack 2. I had my old computer hooked up with the serial PPP connection and everything worked great. I had it connected to the computer with a USB to serial adapter, because my old laptop didn't have a serial port. The new laptop is the same way. In following Otto's guide, the first step is to edit the file c:\windows\inf\mdmhayes.inf. My laptop has no such file. When I connected the usb/adapter/tivo to my computer, no "Add new Hardware" wizard starts. No port shows up in the "New Modems" wizard. What should I do from here? Any help is greatly appreciated.