I have one possible suggestion that might speed up your goals of getting an ecrypting filesystem on PC Clones, although I'm not exactly sure how to put it politely: Seeing as you're looking for encrypting filesystems to work on PC clones, have you made sure such code doesn't exist already? Why not just scrounge through ftp sites (or archie) until you find an already written DOS program that does what you like, and use it instead? With DOS's huge installed user base, I have an extremely difficult time believing that this stuff doesn't already exist for it. Ryan, I don't intend to demean your efforts to bring privacy to the hard drives of the great unwashed masses, (especially if they really are without options at this point)--on the contrary, it's quite a noble goal, and would be a good programming project in its own right even if other solutions do exist, but I'd hate to see you waste your efforts if the same thing really exists elsewhere. -Mark Shewmaker