DampedOrb :
Rogue Leader :
Are you on the newest Windows 10 update 1803? This is a known issue with it.
Idk but I did update recently
The most recent update from a few weeks ago has caused this issue.
see below others have had this issue:
https://www.bleepingcomputer.com/forums/t/677832/april-features-update-seems-to-have-created-a-phantom-drive/
Couple fixes in there as well.