First, download the Huawei E220 driver from the link below and extract it into a folder.
Get Huawei drivers for E220 modem
Take your pen drive and copy that folder into the pen drive and remove the pen drive from USB. Now, connect the E220 modem to the USB port and again insert pen drive to another USB port. Go to the Huawei driver folder inside the pen drive and double click on the DataCard_Setup64.exe file (if your PC's operating system is 64 bit, otherwise double click on DataCard_Setup.exe).
Control Panel > System > Device Manager
Remove any USB device which connects to USB ports (Remove the Pen drive) except the E220 modem.
In the Device Manager, double click on the Universal Serial Bus Controllers. Here you can see USB Mass Storage Device as shown in figure below.
Browse My Computer for Driver Software.
In the new window, untick the Show compatible hardware
Here, it is required to click on the the (Standard USB Host Controller) in the left side under the Manufacturer. Hence, you can see in the right side under the Model, there is a model called USB Composite Device. Click on this USB Composite Device and click Next to continue.
Hence, it will install the drivers to the PC. During this installation, a message pop up in the taskbar as shown in the figure below. Click on that message to see details of drivers which was installed.
It should open the details of the drivers. You can see there are some new drivers added. Now, your device is ready for use in Windows 64bit system. Reconnect the modem to the USB and run the mobile partner. It will detect your modem successfully.
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