About USB Drivers:

In order for your phone to communicate with your PC, you need to install the proper USB drivers and connect the two via a USB cable. Your operating system may automatically install a generic USB driver, but these are often limited and do not offer the full range of features that drivers custom-tailored for your mobile phone usually offer.
... that you uninstall any previous Phone to PC USB drivers you may already have on your personal computer, ... an installation CD with software applications, including the USB driver that you need. You might not be ... devices, and the only way to install the USB drivers is by installing the provided software.

drivers so that you won't miss any updates.

  It is highly recommended to always use the most recent driver version available.

Try to set a system restore point before installing a device driver. This will help if you installed an incorrect or mismatched driver. Problems can arise when your hardware device is too old or not supported any longer.