The chance is that you installed the incorrect driver for your phone on the computer.
Try to uninstall it then search the correct driver to install.
Hope this tool (http://bit.ly/driver-updater-and-finder) can help you complete the driver removal and reinstallation.
Firstly, uninstall the phne driver
After the removal, rescan your computer for a correct driver to download and install.
You didn’t mention what OS you are using, so I’m going to assume it is a version of Windows. Check out this Microsoft trouble shooter that covers hangs with Windows 7, 8, and 8.1. https://support.microsoft.com/kb/2681286