Remove the modem by clicking on the "safely remove hardware". The button is at the right side of the desktop, at the bottom of the screen. Has the appearance of green arrows. After the computer writes that the device can be removed, remove the modem from the USB connector.
Open the folder "My computer" and select "add or remove programs".
After the computer generates a list, find the icon that corresponds to the modem. Usually the modem icon can be viewed on your desktop computer.
Click on "Remove". When you see a warning window that says "are you sure You want to remove this program?", click "Yes".
The computer will automatically remove the modem and all its components.
After removing the operating system needs to restart.