Hp pavilion 4540

If the modem is still under warranty, and you don't feel inclined to buy one yourself, HP is pretty much at liberty to put in whatever modem they see fit. The best option however, is to go out and buy yourself a decent hardware modem (software modems take up CPU time and some can slow down your computer). Hardware is a little more expensive that software, so if software is the way you want to go, purchase one from a reputable manufacturer, but stay away from any modems based on Motorola or Rockwell/Conexant chips. Go with Intel or US Robotics.