Press Windows + R key combination, type devmgmt.msc and click OK. Expand the Network Adapters list, right-click on the modem driver and select Uninstall. After that, reboot your computer, press Scan for hardware changes icon from Device Manager and reinstall the drivers. If you no longer have the modem drivers, go to Start > All Programs > Accessories > System Tools > System Information, expand the Components list, click Modem and check the device model in the right pane. After that, navigate to the developer's website and download and install the latest drivers available.
