1.Right click on MY computer ->Properties->Hardware->Device manager.
2.You will get Device manager window popping out.
3.Scroll down to "Universal Serial BUS controllers".Click on the (+) sign.
4.Check for the "USB Composite Device" and right click on it, click Uninstall.(IMPORTANT NOTE:wE HAVE TO UNINSTALL THE PRINTER'S USB COMPOSITE DEVICE, TO KNOW WHETHER IS THE PRINTER'S USB COMPOSITE DEVICE, RIGHT CLICK ON USB COMPOSITE DEVICE AND PROPERTIES,look for wat location says, Eg -LOCATION : HP DESKJET F2100
5.Disconnect the USB and reboot the PC.
6.Connect the USB after reboot, you will get popup "Found new hardware".Then the Drivers will be installed Automatically.
Thanks Riz
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