Over the last week or so I have been trying out external USB Blu-ray drives from different manufacturers. After a time they stopped working. None of them worked. Uninstall. Install. Load drivers...nothing. Then I noticed a drive listed under portable devices (device manager) that really didn't exist. I eventually deleted it with diskpart; list volume; select volume;delete. That worked ONCE. The phantom has returned and no matter WHAT I do, it reappears at each re-boot. I Can Not Delete What Isn't There.