No one will ever notice locked files existence. Your files can not be deleted by erasing program folder or it can't be uninstalled without the correct password. It's fully portable, so you can copy or install to USB sticks, floppy, CDs and DVDs, notebooks, and network disks. Works with any Windows versions and FAT/FAT32/NTFS formats. Just drag and drop your files or Lock folders in Windows Explorer via a right click. Multi password/user interface also protects critical files from novice users. Thanks to lightning fast file protection engine, you can lock gigabytes of data or thousands of files in less than a second!