Error dialog "WARNING: The host file/device is already in use!" needs better precision
I experienced this issue yesterday with a non system disk that I recently entirely encrypted. I first tried jodasourcefourge's suggestion to toggle the disk's Online/Offline state. That did nothing. I then tried Mounir IDRASSI's suggestion to use Process Explorer to find the offender who was already using the disk. First, you must run Process Explorer as Administrator. Second, once you have opened Process Explorer, you should do Find --> Find Handle or DLL... and in the dialog that opens enter the...