Usually, Windows will find and automatically install the necessary drivers when you install a modem. However, if Windows can't find or install the right driver for your modem, you might need to install the modem manually.
Open Phone and Modem Options by clicking the Start button , clicking Control Panel, clicking Hardware and Sound, and then clicking Phone and Modem Options.
You might need to provide information such as your country or region and any special phone dialing rules in the Location Information dialog box before you can access the Phone and Modem Options dialog box.
Click the Modems tab.
Click Add, and then follow the instructions in the Add Hardware Wizard.
If Windows automatically installs the wrong driver, or if you have problems with your modem, you can remove it.
Select the modem you want to remove, and then click Remove.