Usb driver is most needed thing to connect your mobile with computer for exchanging of files from computer to mobile or mobile to your pc. If you wish to connect your mobile with computer and use internet on your pc you will need to install its usb parent driver first. Otherwise you can't connect your mobile with your pc. With out usb driver your computer will not detect your phone.
The latest usb driver of Nokia x has been released and simple downloading link is available for download.
You can download latest usb driver from provided link which is given below of post.