Secret Disk – Lock your hard disk with a password ! Software to create secure hard disk on your computer which may be locked and unlocked with a password to store your private files. Secret Disk doesn’t appear in your Windows system and is completely invisible. When unlocked Secret Disk appears as a hard disk on your PC. Use your files and folders as usual. Works with any third-party software, games and media, and no additional hardware required! Free for Windows XP and Vista.