First, right-click on Computer icon, select Manage and open Device Manager. Expand the Networks adapters list, right-click on the driver and select Uninstall. After that, reboot your computer, connect the modem and press Scan for hardware changes icon from Device Manager. Wait Windows to recognize the device, double-click the Computer icon, right-click the CDMA1X drive and select Open. Look for the Setup file and try installing the package using Windows 7 Compatibility Mode.