TrueCrypt is a free, open-source application for Windows XP and Windows Vista that will create a mountable, virtual, encrypted, hard disk. The encrypted files can be easily transported to mobile media including thumb drives, CDs, external hard drives, etc. The entire process is graphical and can be completed by users of any experience level. TrueCrypt accepts command line parameters which allows you to create a batch file to automatically mount your encrypted virtual hard disk. TrueCrypt will dynamically increase the size of your partition if you run out of drive space.Windows Vista Video Training   read more »