We have some computers that get thumb drives plugged into them on a weekly basis. Every computer on the network has a drive mapped to F: and the thumb drives need to be set to G: for the program that accesses them to work properly. The problem is that Windows doesn't notice that F: is already taken by the mapped drive and usually tries to set the thumb drive to F:. Since there are several different thumb drives that get used as the G: drive, and Windows isn't particularly reliable for remembering the drive letter to begin with, this causes frequent problems. Is there any way to tell Windows what the first available drive letter is so I can avoid this?