|The modem is on a removable card installed in a mboard slot. If anyone has installed a dfferent modem, the HP software probably won't work with it.|
If you DO still have the original modem card, you must install the software the RIGHT WAY.
Unless the instructions for installing a device tell you otherwise.......
You DO NOT install drivers for a device while booting into Windows, if the software for the device has not been installed yet - when Windows detects a generic device or New Hardware while booting, you allow it to search for drivers, it doesn't find any, and it wants you to show it the location of the drivers - CANCEL that, continue on to the desktop, and install the software for the device using the proper installation from a CD or the proper installation file that you downloaded from the web.
Usually you DO NOT install drivers when Found New Hardware pops up, no matter when it pops up !