Thanks Jock1e - I checked Device Manager and get the following message - A driver (service) for this device has been disabled. An alternate driver may be providing this functionality. (Code 32) I tried to update driver but got message that driver was OK. There was something about enabling it in Registry but I didn't want to dive into registry unless I was following instructions on what to do!!
What is ransomware and how do I protect my PC from Petya?