US Robotics Sportster Winmodem 33.6 Free Driver Download

Windows found it as a 28.8 but it's actually a 33.6. Unzip these files to the hard drive. Don't run the setup program! Instead, delete the modem from Device Manager and reboot. When Windows finds the modem, have it look in the directory you unzipped to. If it can't find "winmodem.cpl" (EVEN THOUGH IT'S RIGHT THERE!!!!) click OK over and over again. Mine found it on about the tenth click.

I hope this helps.