ADB not shown in device manager
I installed ADB per this thread last night and followed directions. All seemed good. I am using windows 10, which received an update today. Now ADB does not show in my device manager and I seem to have a driver issue that I can't correct due to this. My phone does not show under 'other devices' so I cannot follow the directions to get adb to display in device manager again. My Verizon turbo now shows under portable devices in device manager and I have no option to install adb drivers as I did last night when installing adb. I can only update an MTP driver there. Before todays system update, I was able to see my device in command prompt using 'adb devices' when the phone was booted. I could use the adb command to send the phone to fastboot and then see my device ID with the 'fastboot device' command. Now, I can still do those except 'fastboot devices' yields no results in the command prompt. I can enter fastboot and it will list its commands as usual, so it seems to still be there, but I suspect a driver issue. I have tried reinstalling adb per this thread and the install seems to be fine, but since i cannot see adb in device manager, i cannot update the drivers again.
I cannot find instructions to remove ADB and start fresh.
Any help is appreciated.