Right click on my computer and hit properties. Go to the hardware tab and hit the device manager button. When it opens look and see if there is a big yellow question mark or exclamation point by the modem. If there is double click on the modem entry, and go to the driver tab Hit uninstall then apply OK yourself out of there and reboot. Windows should reinstall it automatically. If it doesn't then download and install Everest. Go to devices, them PCI devices. Scroll through the trop window until you fond the modem. Highlight it and write down the info on the bottom window under device properties/device description. Post back and give me the model number of the system and the modem info and I'll try to help you find a driver.