The cad system I inherited with many users needs mapped drives of e and f. Often times plugging in a flash, thumb, or usb drive windows assigns the drive letter of a mapped drive to the usb drive. Is there any way to stop windows from doing that?
Use disk manager to assign a drive letter to the offending thumb drives. Once you do this they will get a non interfering letter from then on. Unfortunately Windows has a habit of doing this. It's a lot better with Win7 but still happens from time to time.