Folder Lock is fast file-security software. Unlike encryption, it takes only a few seconds to secure your files. The program lets you lock, hide, and password-protect any number of files, folders, pictures, and documents. The program can lock these files quickly without interfering with your system files. With simple drag and drop, your files can be locked on the fly. Once locked, files cannot be read or seen. This program works on all versions of Windows (2003 Server, XP, 2000, NT, Me, 98, 95) and disk (FAT16, FAT32, NTFS, EFS). It also lets you protect data on USB flash drives and even on floppy disks. It doesn't load itself in the background, saving RAM. Files remain locked, hidden, and protected in Windows Explorer, DOS mode, and Safe Mode and can only be accessed with the correct password. The program cannot be uninstalled without the password, and lets you keep all files and folders in a single place without much mess.

Version 4.375 fixes bugs related to locker window.