Hi Keith,
Thanks for your reply.
I suggest you to perform a System Restore and check if it works:
This kind of issue usually happens when the Updates for the devices on the computer is installed. Thus, there is a possibility that this may conflict with/damage the existing device drivers and thus the device might not work as expected. To perform a System Restore, you may refer to the article below and refer the section “Restore your PC to an earlier point in time”:
**http://windows.microsoft.com/en-us/windows-8/restore-refresh-reset-pc**
Important: The System Restore restores the computer back to an earlier point in time, called a restore point. System Restore doesn’t change your personal files, but it might remove recently installed apps and drivers and also reset the recently changed settings on the computer.
Hope this will fix the issue, if not let us know with the updated status and we will be happy to assist you further.